# NEC4 ECC: Option A - can you use options X15 and X21 together?

**URL:** <https://reachback.builtintelligence.com/t/nec4-ecc-option-a-can-you-use-options-x15-and-x21-together/4165>\
**Category:** NEC3 and NEC4 Contracts\
**Created:** [28 June 2017 17:51 UTC](https://reachback.builtintelligence.com/t/nec4-ecc-option-a-can-you-use-options-x15-and-x21-together/4165 "2017-06-28T17:51:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Manny26](https://dub1.discourse-cdn.com/flex013/user_avatar/reachback.builtintelligence.com/manny26/32/55_2.png) [@Manny26](https://reachback.builtintelligence.com/u/Manny26)\
**Post date:** [28 June 2017 17:51 UTC](https://reachback.builtintelligence.com/t/nec4-ecc-option-a-can-you-use-options-x15-and-x21-together/4165/1 "2017-06-28T17:51:03Z")

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We are putting together a contract ECC option A using the new NEC4 contract. The Client has specified that X21 is included and the contractor has requested X15. Can they both be included?

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**Author:** ![Jon\_Broome](https://dub1.discourse-cdn.com/flex013/user_avatar/reachback.builtintelligence.com/jon_broome/32/192_2.png) [@Jon\_Broome](https://reachback.builtintelligence.com/u/Jon_Broome)\
**Post date:** [30 June 2017 17:38 UTC](https://reachback.builtintelligence.com/t/nec4-ecc-option-a-can-you-use-options-x15-and-x21-together/4165/2 "2017-06-30T17:38:30Z")

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NEC3 does not have X21, but NEC4 does. Please can you clarify what your X21 is for ?

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**Author:** ![Barry\_Trebes](https://dub1.discourse-cdn.com/flex013/user_avatar/reachback.builtintelligence.com/barry_trebes/32/517_2.png) [@Barry\_Trebes](https://reachback.builtintelligence.com/u/Barry_Trebes)\
**Post date:** [19 July 2017 15:13 UTC](https://reachback.builtintelligence.com/t/nec4-ecc-option-a-can-you-use-options-x15-and-x21-together/4165/3 "2017-07-19T15:13:03Z")

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The secondary options are: NEC4 X21 Whole Life Cost and X15 The Contractor’s design - there is no reason why these two secondary options cannot be used together.