diff --git a/lib/utilsInternal.ts b/lib/utilsInternal.ts
index b95256e00..6cedfd507 100644
--- a/lib/utilsInternal.ts
+++ b/lib/utilsInternal.ts
@@ -1,6 +1,6 @@
 import { promisify } from "es6-promisify";
 import { BlockWithoutTransactionData, FilterResult } from "web3";
-import { Address, fnVoid } from "./commonTypes";
+import { Address, fnVoid, Hash } from "./commonTypes";
 import { Utils, Web3 } from "./utils";
 
 /**
@@ -65,6 +65,10 @@ export class UtilsInternal {
     return !address || !Number.parseInt(address, 16);
   }
 
+  public static isNullHash(hash: Hash): boolean {
+    return !hash || !Number.parseInt(hash, 16);
+  }
+
   /**
    * Returns promise of the maximum gasLimit that we dare to ever use, given the
    * current state of the chain.
diff --git a/lib/wrappers/genesisProtocol.ts b/lib/wrappers/genesisProtocol.ts
index 36efc2937..81bea15b4 100644
--- a/lib/wrappers/genesisProtocol.ts
+++ b/lib/wrappers/genesisProtocol.ts
@@ -15,7 +15,8 @@ import {
   ArcTransactionResult,
   DecodedLogEntryEvent,
   IContractWrapperFactory,
-  IVotingMachineWrapper
+  IVotingMachineWrapper,
+  StandardSchemeParams,
 } from "../iContractWrapperBase";
 import { ProposalService } from "../proposalService";
 import { TransactionService, TxGeneratingFunctionOptions } from "../transactionService";
@@ -332,13 +333,71 @@ export class GenesisProtocolWrapper extends IntVoteInterfaceWrapper
   }
 
   /**
-   * Return the threshold that is required by a proposal to it shift it into boosted state.
-   * The computation depends on the current number of boosted proposals created for
-   * this voting machine by the DAO or other contract, as well as the GenesisProtocol
-   * parameters thresholdConstA and thresholdConstB.
-   * @param {GetThresholdConfig} options
+   * Return the threshold that is required for a proposal to be shifted into the boosted state.
+   * The computation depends on the current number of boosted proposals that were created for
+   * this voting machine by the scheme at `schemeInfo.address` for the given `avatarAddress`
+   * (`avatarAddress` is the `organizationAddress` given to the `propose` method),
+   * and the GenesisProtocol parameters `thresholdConstA` and `thresholdConstB` which
+   * are registered on behalf of the given scheme with an avatar's Controller,
+   * keyed by the given `avatarAddress`.
+   *
+   * Thus `avatarAddress` must be an avatar address and this function will not work if
+   * you pass for `avatarAddress` any other contract address than an avatar, even though
+   * GenesisProtocol is capable of using those non-avatar contract addresses.
+   * In those cases, when the organization is not an avatar, you must use `getThresholdFromProposal`
+   * to obtain the threshold.
+   *
+   * Note that there will be a separately-scoped threshold for proposals created for this
+   * voting machine by any other scheme than the one given.
+   *
+   * Note that for Arc.js schemes you can just pass an Arc.js contract wrapper for `schemeInfo`.
+   */
+  public async getThresholdForSchemeAndCreator(
+    schemeInfo: ThresholdSchemeInfo,
+    avatarAddress: Address): Promise<BigNumber> {
+
+    if (!schemeInfo) {
+      throw new Error("schemeAddress is not defined");
+    }
+
+    if (!avatarAddress) {
+      throw new Error("avatarAddress is not defined");
+    }
+
+    const organizationId = this.organizationIdFromProposalCreator(schemeInfo.address, avatarAddress);
+
+    const votingMachineInfo = await schemeInfo.getSchemeParameters(avatarAddress);
+
+    if (!votingMachineInfo) {
+      throw new Error("votingMachineInfo is null, avatarAddress may not be an avatar");
+    }
+
+    if (votingMachineInfo.votingMachineAddress !== this.address) {
+      throw new Error("the scheme is not using this voting machine");
+    }
+
+    const votingMachineParamsHash = votingMachineInfo.voteParametersHash;
+
+    if (UtilsInternal.isNullHash(votingMachineParamsHash)) {
+      throw new Error("avatarAddress does not yield a parameters hash, may not be an avatar");
+    }
+
+    this.logContractFunctionCall("GenesisProtocol.threshold",
+      { schemeInfo, avatarAddress, votingMachineParamsHash, organizationId });
+
+    return this.contract.threshold(votingMachineParamsHash, organizationId);
+  }
+  /**
+   * Return the threshold that is required for a proposal to be shifted into the boosted state.
+   * The computation depends on the current number of boosted proposals that were created for
+   * this voting machine by the scheme that created the given proposal,
+   * and the GenesisProtocol parameters `thresholdConstA` and `thresholdConstB` which
+   * are stored with the proposal.
+   *
+   * Note that there will be a separately-scoped threshold for proposals created for this
+   * voting machine by any other scheme than the one that created the given proposal.
    */
-  public async getThreshold(proposalId: Hash): Promise<BigNumber> {
+  public async getThresholdFromProposal(proposalId: Hash): Promise<BigNumber> {
 
     if (!proposalId) {
       throw new Error("proposalId is not defined");
@@ -373,7 +432,8 @@ export class GenesisProtocolWrapper extends IntVoteInterfaceWrapper
 
     const organizationId = this.organizationIdFromProposalCreator(schemeAddress, creatorAddress);
 
-    this.logContractFunctionCall("GenesisProtocol.getBoostedProposalsCount", creatorAddress);
+    this.logContractFunctionCall("GenesisProtocol.getBoostedProposalsCount",
+      { schemeAddress, creatorAddress, organizationId });
 
     return this.contract.getBoostedProposalsCount(organizationId);
   }
@@ -1352,6 +1412,12 @@ export interface ExecutedGenesisProposal extends GenesisProtocolProposal {
 }
 
 export interface GenesisProtocolProposal {
+  /**
+   * This is what will appear as `_organization` in voting machine events.
+   * It is the value passed to `propose` as the optional argument: `organizationAddress`.
+   * If this argument is set to zero in `propose` then the value will be the msg.sender.
+   * With proposals created by Arc universal schemes (like GenesisProtocol), this is the avatar address.
+   */
   creatorAddress: Address;
   /**
    * in seconds
@@ -1420,3 +1486,20 @@ export interface GetNumberOfChoicesConfig {
    */
   proposalId: string;
 }
+
+/**
+ * Input to `GenesisProtocolWrapper.getThresholdForSchemeAndCreator`.  Provides info about a
+ * proposal-creating scheme that is generating proposals using GenesisProtocol.
+ */
+export interface ThresholdSchemeInfo {
+  /**
+   * address of the scheme
+   */
+  address: Address;
+  /**
+   * Returns promise of a `StandardSchemeParams` as the referenced scheme's parameters, as registered
+   * with the given avatar address.
+   * @param avatarAddress
+   */
+  getSchemeParameters(avatarAddress: Address): Promise<StandardSchemeParams>;
+}
diff --git a/mkdocs.yml b/mkdocs.yml
index 79e2e30d9..b40cf5b76 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -286,6 +286,7 @@ nav:
   - StandardTokenChangeApprovalOptions : 'api/interfaces/StandardTokenChangeApprovalOptions.md'
   - StandardTokenTransferFromOptions : 'api/interfaces/StandardTokenTransferFromOptions.md'
   - StandardTokenTransferOptions : 'api/interfaces/StandardTokenTransferOptions.md'
+  - ThresholdSchemeInfo : 'api/interfaces/ThresholdSchemeInfo.md'
   - TokenCapGcParams : 'api/interfaces/TokenCapGcParams.md'
   - TransactionReceiptsEventInfo : 'api/interfaces/TransactionReceiptsEventInfo.md'
   - TransactionReceiptTruffle : 'api/interfaces/TransactionReceiptTruffle.md'
diff --git a/package.json b/package.json
index 5d4e3a65e..346501e2b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@daostack/arc.js",
-  "version": "0.0.0-alpha.87",
+  "version": "0.0.0-alpha.88",
   "description": "A JavaScript library for interacting with @daostack/arc ethereum smart contracts",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/test/genesisProtocol.ts b/test/genesisProtocol.ts
index e147f0f00..1a0939855 100644
--- a/test/genesisProtocol.ts
+++ b/test/genesisProtocol.ts
@@ -30,7 +30,7 @@ describe("GenesisProtocol", () => {
   let contributionReward: ContributionRewardWrapper;
 
   const sufficientStake = async (proposalId: Hash, amount: number): Promise<BigNumber> => {
-    return (await genesisProtocol.getThreshold(proposalId)).add(web3.toWei(amount));
+    return (await genesisProtocol.getThresholdFromProposal(proposalId)).add(web3.toWei(amount));
   };
 
   const createProposal = async (): Promise<Hash> => {
@@ -542,9 +542,16 @@ describe("GenesisProtocol", () => {
     assert(typeof result !== "undefined");
   });
 
-  it("can call getThreshold", async () => {
+  it("can call getThresholdFromProposal", async () => {
     const proposalId = await createProposal();
-    const result = await genesisProtocol.getThreshold(proposalId);
+    const result = await genesisProtocol.getThresholdFromProposal(proposalId);
+    assert(typeof result !== "undefined");
+  });
+
+  it("can call getThresholdForSchemeAndCreator", async () => {
+    const result = await genesisProtocol.getThresholdForSchemeAndCreator(
+      contributionReward,
+      dao.avatar.address);
     assert(typeof result !== "undefined");
   });
 
diff --git a/test/redeemer.ts b/test/redeemer.ts
index d59cdc56d..b9fbb2666 100644
--- a/test/redeemer.ts
+++ b/test/redeemer.ts
@@ -76,7 +76,7 @@ describe("Redeemer", () => {
     await helpers.vote(result.votingMachine, proposalId, BinaryVoteResult.No, accounts[2]);
     await helpers.vote(result.votingMachine, proposalId, BinaryVoteResult.Yes, accounts[3]);
 
-    const stakeAmount = (await gp.getThreshold(proposalId)).add(web3.toWei(10));
+    const stakeAmount = (await gp.getThresholdFromProposal(proposalId)).add(web3.toWei(10));
 
     await (await gp.stakeWithApproval({ amount: stakeAmount, vote: 1, proposalId })).getTxMined();