Every employer entitled to receive a tax credit against his West Virginia personal income tax liability as provided in article two-c, chapter twenty-one-a of this code shall receive the credit for the period and in the amount specified in said article two-c. The State Tax Commissioner shall provide by appropriate rule or regulation for the reporting, filing and application of claims of the tax credit provided for in a manner in conformity with the legislative purpose as declared in section two, article two-c, chapter twenty-one-a of this code.