48 CFR § 22.1007 - Requirement to obtain wage determinations.
The contracting officer shall obtain wage determinations for the following service contracts:
(a) Each new solicitation and contract in excess of $2,500.
(b) Each contract modification which brings the contract above $2,500 and -
(1) Extends the existing contract pursuant to an option clause or otherwise; or
(2) Changes the scope of the contract whereby labor requirements are affected significantly.
(c) Each multiple year contract in excess of $2,500 upon -
(1) Annual anniversary date if the contract is subject to annual appropriations; or
(2) Biennial anniversary date if the contract is not subject to annual appropriations and its proposed term exceeds 2 years - unless otherwise advised by the Wage and Hour Division.