DFARS 227.7103-7 Use and non-disclosure agreement contains a template for a Non-Disclosure Agreement (NDA). But it says nothing about requiring the CO to incorporate the NDA into the contract between the federal agency and the contractor.
The way the NDA template is written, it gives rights to the other contractor whose proprietary information will be "accessed" by the contractor who signs the NDA.
But it really doesn't seem to give the federal agency (DOD) any rights to say, if you breach the NDA, that is a material breach of the contract. In order to be a material breach of the contract, doesn't the NDA have to be "incorporated" into the contract?