(a) In general. The Commissioner is authorized to grant a reasonable extension of time for filing any return, declaration, statement, or other document which relates to any tax imposed by subtitle A of the Code and which is required under the provisions of subtitle A or F of the Code or the regulations thereunder. However, other than in the case of taxpayers who are abroad, such extensions of time shall not be granted for more than 6 months, and the extension of time for filing the return of a DISC (as defined in section 992(a)), as specified in section 6072(b), shall not be granted. Except in the case of an extension of time pursuant to §1.6081–5, an extension of time for filing an income tax return shall not operate to extend the time for the payment of the tax unless specified to the contrary in the extension. For rules relating to extensions of time for paying tax, see §1.6161–1.