41 C.F.R. § 301-71.201

The reviewing official must have full knowledge of the employee's activities. The reviewing official must ensure:

(a) The claim is properly prepared in accordance with the pertinent regulations in this subtitle and agency procedures;

(b) A copy of authorization for travel is provided;

(c) The types of expenses claimed are authorized and allowable expenses;

(d) The amounts claimed are accurate; and

(e) The required receipts, statements, justifications, etc., are attached to the electronic travel claim.