Applicability of clauses in a solicitation against a GSA contract

I am currently in the process of creating a solicitation to utimately create a BPA for medical staffing services. I plan to procure these services off of GSA. There has been some debate as to whether to include clauses such as 52.212-4 and 52.212-5 in the solcitation. I have always been taught that if these clauses are in the GSA contract, then you would not duplicate them in a solcitation. Others in my office put these clauses in the solicitation even if the base GSA contract has them included. Trying to get an answer on the "correct" way to proceed.....if there one. Thank you!