The use proposed to be substituted shall be permitted as of right, by special exception or by conditional use approval in the zone in which the existing nonconforming use would be permitted as of right, by special exception or by conditional use or the proposed use to be substituted would be permitted as of right, by special exception or by conditional use approval in a more restrictive zone than the existing nonconforming use. For the purposes of this subsection, the following sequence shall be used to determine which zone is more restrictive, with the most restrictive zone being first named: Agricultural Zone (A), Rural/Estate Residential Zone (RE), Conservation Zone (C), R-1 Residential Zone (R-1), R-2 Residential Zone (R-2), Mixed Use Zone (MU), Community Commercial Zone (CC), Industrial-1 Zone (I-1), Airport Industrial Zone (I-2) and Quarry Zone (Q).