In the event of the sum due under any bond or obligation to Her Majesty on which diligence may competently proceed under this or any other Act not being set forth specifically therein, a stated account of the sum due under it, having annexed to it a certificate signed by any officer of the Revenue, in the form as nearly as may be of the schedule M hereunto annexed, recorded along with such bond or obligation, shall be sufficient to ascertain the sum due under such bond or obligation; and the extractor shall, in extracting the decree proceeding upon such bond or obligation, make the warrant of charge and for diligence to be contained in such extract applicable to the sum in the said stated account, in the like manner in all respects as if such sum in the said stated account had been actually specified in such bond or obligation, and thereupon all diligence and execution shall proceed as if it had been so specified: Provided always, that no such bond or obligation granted after the date of this Act shall be entitled to the privilege hereby conferred, unless there be inserted therein a specific clause conferring such privilege.