CFR > Title 5 - Administrative Personnel > CHAPTER I—OFFICE OF PERSONNEL MANAGEMENT > SUBCHAPTER B—CIVIL SERVICE REGULATIONS (parts 110 to 990) > PART 844—FEDERAL EMPLOYEES' RETIREMENT SYSTEM—DISABILITY RETIREMENT > SUBPART C—Computation of Disability Annuity (§844.301 to §844.305) > 844.301—Commencing date of disability annuity.