---
title: "FIX 5.0 SP2 EP292: <LegInstrumentParties> component block – FIX Dictionary – Onix Solutions"
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# <LegInstrumentParties> component block

## FIX 5.0 SP2 EP292

### Description

 The use of this component block is restricted to instrument definition only and is not permitted to contain transactional information. Only a specified subset of party roles will be supported within the LegInstrumentParty block.

### Structure

| Tag | Field Name | Req'd | Comments |  |
| --- | --- | --- | --- | --- |
| 2254 | [NoLegInstrumentParties](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2254.html) | N | Repeating group below should contain unique combinations of [LegInstrumentPartyID <2255>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2255.html), [LegInstrumentPartyIDSource <2256>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2256.html) and [LegInstrumentPartyRole <2257>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2257.html). |  |
| → | 2255 | [LegInstrumentPartyID](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2255.html) | N | Used to identify the source of PartyID. Required if [LegInstrumentPartyIDSource <2256>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2256.html) is specified. Required if [NoLegInstrumentParties <2254>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2254.html) > 0. |
| → | 2256 | [LegInstrumentPartyIDSource](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2256.html) | N | Used to identify class source of [LegInstrumentPartyID <2255>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2255.html) value (e.g. BIC). Required if [LegInstrumentPartyID <2255>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2255.html) is specified. Required if [NoLegInstrumentParties <2254>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2254.html) > 0. |
| → | 2257 | [LegInstrumentPartyRole](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2257.html) | N | Identifies the type of [LegInstrumentPartyID <2255>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2255.html) (e.g. Executing Broker). Required if [NoLegInstrumentParties <2254>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2254.html) > 0. |
| → | 2379 | [LegInstrumentPartyRoleQualifier](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_2379.html) | N |  |
| → | [Component Block - <LegInstrumentPtysSubGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/compBlock_LegInstrumentPtysSubGrp.html) | N | Repeating group of party sub-identifiers. |  |

### Used In

- [<InstrumentLeg>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/compBlock_InstrumentLeg.html)

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