I would have the AR specify whether the foul is a personal or unsportsmanlike conduct foul, because that would change the enforcement.
The edited AR would look as follows: AR 10-2-3-IV (FI - 78)
Team A’s successful field goal attempt is snapped at Team B’s 30-yard line,
and a Team B player fouls commits a foul that
(a) is not unsportsmanlike and personal
OR (b) is unsportsmanlike or personal
at the 20-yard line during the kick.
RULING:
In (a) Team A may decline the penalty and accept the score or void the score and
have Team B penalized at the previous spot (Rule 10-2-5-d). In (b) Team A may accept the score and have the penalty enforced on the kickoff