The Secretary may waive or vary provisions of this chapter: To the extent that the waiver or variance is consistent with Housing and Community Development Article, Title 6, Subtitle 3, Annotated Code of Maryland; and If, in the written determination of the Secretary, the application of a regulation in a specific case or in an emergency situation would be inequitable or contrary to the purposes of Housing and Community Development Article, Title 6, Subtitle 3, Annotated Code of Maryland.