d. Combinations. Authorized abbreviations may be combined if--
(1) The resulting abbreviation or brevity code has not already been assigned a different meaning.
(2) The entire phrase or sentence has not been assigned a different
abbreviation or brevity code; for example, AG is the authorized brevity
code for Adjutant General's Corps. Abbreviations and brevity codes
designated for groups of words must not be separated and used singularly.
For example, the "A" in "AG" stands for "adjutant" in "Adjutant General's
Corps," but if the word "adjutant" is abbreviated, "adj" must be used.