Section 603.700 - Standards for purchasing systems of for-profit firms(a) If the TIA is an expenditure-based award, it should require for-profit participants that currently perform under DOE assistance instruments subject to the purchasing standards in 10 CFR 600.331 to use the same requirements for the TIA, unless there are programmatic or business reasons to do otherwise (in which case the reasons must be documented in the award file).(b) Other for-profit participants under an expenditure-based TIA should be allowed to use their existing purchasing systems, as long as they flow down the applicable requirements in Federal statutes, Executive Orders or Government-wide regulations (see Appendices A and B to this part for a list of those requirements).