5 CFR § 894.401 - How do I pay premiums?
(a) Employees and employees of the United States Postal Service pay premiums through payroll allotments.
(b) Annuitants and survivor annuitants pay premiums through annuity allotments.
(c) Compensationers pay premiums through allotments from compensation payments.
(d) In limited circumstances, individuals may make direct premium payments. See § 894.405.
(e) A sponsor, TEI certifying family member, TEI former spouse, or TEI who is an unremarried survivor pays premiums the following ways:
(1) A sponsor or TEI certifying family member who receives uniformed services pay or uniformed services retirement pay shall pay premiums through deduction from payroll (including uniformed services retirement pay deduction).
(2) A sponsor or TEI certifying family member who is not described in paragraph (e)(1) of this section, and a TEI former spouse or TEI who is an unremarried survivor shall pay premiums through:
(i) Automatic bank withdrawal; or
(ii) Direct premium payments.