[Code of Federal Regulations] [Title 20, Volume 1] [Revised as of April 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 20CFR220.15] [Page 264] TITLE 20--EMPLOYEES' BENEFITS CHAPTER II--RAILROAD RETIREMENT BOARD PART 220_DETERMINING DISABILITY--Table of Contents Subpart C_Disability Under the Railroad Retirement Act for Work in an Employee's Regular Railroad Occupation Sec. 220.15 Effects of work on occupational disability. (a) Disability onset when the employee works despite impairment. An employee who has stopped work in his or her regular occupation due to a permanent physical or mental impairment(s) may make an effort to return to work in his or her regular occupation. If the employee is subsequently forced to stop that work after a short time because of his or her impairment(s), the Board will generally consider that work as an unsuccessful work attempt. In this situation, the Board may determine that the employee became disabled for work in his or her regular occupation before the last date the employee worked in his or her regular occupation. No annuity will be payable, however, until after the last date worked. (b) Occupational disability annuitant work restrictions. The restrictions which apply to an annuitant who is disabled for work in his or her regular occupation are found in Sec. Sec. 220.160 through 220.164.