The memorandum at this link explains the responsibilities of contracting officers. Note that the third bullet on page 2 requires that 52.204-25 be included in contract awards or extensions that commence on or after August 13, 2020. The fourth bullet addresses the necessity to modify contracts, but the August 13 date applies here too. The expanded prohibitions are effective with the August 13 date, so an earlier version of the clause pertains only to contract awards and extensions made before August 13, 2020, and are not subject to mandatory modifications.