The Commission shall instruct the Director to deny a permit if it finds, based on the evidence and information presented to it, that the alteration for which the permit is sought would be inconsistent with, or inappropriate or detrimental to, the preservation, enhancement, or ultimate protection of the historic resource and the purposes of this Subtitle. The Commission shall instruct the Director to issue a permit subject to such conditions as are found to be necessary to insure conformance with the purposes and requirements of this Subtitle, if it finds that: The proposal will not substantially alter the exterior features of the historic resource; The proposal is compatible in character and nature with the historical, archaeological, architectural, or cultural features of the historic resource and is in harmony with the purpose and intent of this Subtitle; The proposal will enhance or aid in the protection, preservation, and public or private utilization of the historic resource in a manner compatible with its historical, archaeological, architectural, or cultural value; The proposal is necessary in order to remedy unsafe conditions or health hazards; The proposal is necessary in order that the owner of the subject property not be deprived of reasonable use of the property or suffer undue hardship; or In balancing the interests of the public in preserving the historic resource with the use and benefit of the alternative proposal, the general public welfare is better served by issuance of the permit. In the case of any application for work within an environmental setting of a Historic Site, or on property located within a Historic District, the Commission shall be lenient in its judgment of applications for structures of little historical or design significance or for new construction. This shall mean that the Commission will authorize issuance of such permit, with any necessary conditions, if authorization of such permit would not impair the character of the Historic Site or Historic District. Nothing in this Subtitle shall be construed to limit new construction, alteration, or repairs to any particular period or architectural style.