Conditions. If the proposed use is similar to a use that is permitted by right in the same district, the Zoning Hearing Board may allow the use, provided the preceding requirements in this section are met. If the proposed use is similar to a use permitted by special exception, the Zoning Hearing Board may allow the use, provided the preceding requirements in this section are met, as well as subject to the conditions expressed for the special exception use that are most similar to the proposed use. If the proposed use is similar to a use permitted by conditional use, the Board of Supervisors may allow the use, provided the preceding requirements in this section are met, as well as subject to the conditions expressed for the conditional use that are most similar to the proposed use. The preceding provisions shall not be construed as a variance.