Is there a standard NEC contract for sub-subcontracting works (i.e. sub-subcontracting a substantial section of a subcontract for mechanical and electrical works, including design)?
If not, what is the best method of sub-subcontracting such works in order that the sub-subcontractor is on like-with-like terms as the subcontract upstream and is thereby obliged to follow the equivalent NEC procedures/mechanisms (e.g. modifying the NEC sub-contract to reflect the sub-subcontract or a bespoke form etc)?