[Code of Federal Regulations] [Title 5, Volume 1] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 5CFR630.402] [Page 777] TITLE 5--ADMINISTRATIVE PERSONNEL CHAPTER I--OFFICE OF PERSONNEL MANAGEMENT PART 630_ABSENCE AND LEAVE--Table of Contents Subpart D_Sick Leave Sec. 630.402 Requesting sick leave. An employee must file an application--written, oral, or electronic, as required by the agency--for sick leave within such time limits as the agency may require. The employee must request advance approval for sick leave for the purpose of receiving medical, dental, or optical examination or treatment and, to the extent possible, for the purposes described in Sec. 630.401(a)(3), (4), and (6).