(a) Within its sole and exclusive discretion, DHS may, after coordination with OPM, set and adjust locality and special rate supplements. In determining the amounts of the supplements, DHS and OPM may consider mission requirements, labor market conditions, availability of funds, pay adjustments received by employees of other Federal agencies, and any other relevant factors.

(b) DHS may, after coordination with OPM, determine the effective date of newly set or adjusted locality and special rate supplements. Established supplements will be reviewed for possible adjustment on an annual basis in conjunction with rate range adjustments under § 9701.322.