37 U.S.C. § 412 : US Code - Section 412: Appropriations for travel: may not be used for attendance at certain meetings

Search 37 U.S.C. § 412 : US Code - Section 412: Appropriations for travel: may not be used for attendance at certain meetings

Appropriations of the Department of Defense that are available
for travel may not, without the approval of the Secretary concerned
or his designee, be used for expenses incident to attendance of a
member of an armed force under that department at a meeting of a
technical, scientific, professional, or similar organization.