301-71.107—When authorizing travel, what factors must the authorizing official consider?
The following factors must be considered:
(a)
The need for the travel;
(b)
The use of travel substitutes (e.g., mail, teleconferencing, etc.);
(c)
The most cost effective routing and means of accomplishing travel; and
(d)
The employee's travel plans, including plans to take leave in conjunction with travel.