; (II) the setting in which the employee performs the duties described in subclause (I); and (III) the interactions with the public required in order for the employee to perform the duties described in subclause (I); and (ii) apply equally to all such agencies. (B) Regulations The Office of Personnel Management may prescribe regulations implementing the pay differential under this section with respect to employees in the executive branch of the Federal Government. (2) Other branches, certain DC employees, and certain Tribal officials (A) In general The employing authority for each agency that is not in the executive branch of the Federal Government— (i) shall develop criteria regarding the means by which to determine the eligibility of an employee in such an agency for the pay differential established under this section