Any application for a certificate of need under Section 22-21-265, for a modification thereto or for an extension thereof shall be made in written form and shall include such information and supporting data relevant to the merits of the application as may be prescribed by the approved rules and regulations of the SHPDA. The application shall be filed with the SHPDA not less than 90 days prior to the date of the proposed obligation for the capital expenditure or the inauguration of the proposed service.