The owner, occupant, or other person in actual charge of a cultural resource shall keep in good repair all of the exterior portions of the improvement, structure, and all interior portions thereof whose maintenance is necessary to prevent deterioration and decay of any exterior architectural feature and any other specifically designated features of the property. If periodic maintenance and upkeep is not done, and the resource falls into disrepair, the fact that it is in disrepair may not be used as justification for demolition or any other alteration which would cause adverse effect as defined in this Part.