In all Cases where there are or shall be Entailer's Debts or other Debts or Sums of Money which might lawfully be made chargeable upon the Fee of an entailed Estate, the Heir of Entail in possession of such' Estate for the Time being shall have all the like Powers with regard to Sale and Disposal of any Portion or Portions of such Estate, for the Purpose of paying off such Debts or Sums of Money, as are conferred by the said recited Act with reference to the Payment of Debt which is validly charged on the Fee of such Estate ; and all the Provisions of the said recited Act respecting Sales which, may be made in order to pay off Debt which is validly charged on the Fee of such Estate as aforesaid, and respecting the Dispositions which may be granted for carrying such Sales into effect, and respecting the Approval of the Prices for which such Sales shall be made, and respecting the Application of the Prices to be obtained upon such Sales, and respecting the Tailzies which may be executed of any Lands to be purchased by means of such Prices, shall be applicable and apply, mutatis mutandis, to Sales which may be made under this Act for paying off Entailer's Debt or other Debts or Sums of Money as aforesaid, and to Dispositions which may be granted for carrying such last-mentioned Sales into effect, and to Prices for which such last-mentioned Sales may be made, and to Tailzies which may be executed of any Lands, to be purchased by means of such Prices.