For purposes of this section, "competitive levels" are groups, within a competitive area, consisting of all positions in the same grade or occupational level that are sufficiently alike in the following characteristics that a person could be assigned to any position without changing the terms of appointment or unduly interrupting the work program:
Nonschool-based personnel or school administrators shall not be assigned or reassigned to the same competitive level as classroom teachers.
D.C. Mun. Regs. tit. 5, r. 5-E1502