If such money shall be laid out and invested in the purchase of lands to be held under entail, or under uses, trusts, intents, and purposes, it shall not be necessary to ingross verbatim in the titles to such new lands the provisions of the entail or other investiture of the said old lands, or to mention specifically the uses, trusts, intents and purposes for and upon which the said new lands are to be held, but it shall be sufficient to state the dates of executing and recording the deed or deeds containing the provisions and conditions subject to which, or the uses, trusts, intents, and purposes to, for, and upon which, the said old lands were held, and to declare that the said new lands shall be held subject to the same provisions and conditions, and to, for, and upon the like uses, trusts, intents, and purposes, and to record the title deed containing such general reference in the register of tailzies, sasines, or other proper record, according to the nature of such title deed, which the keepers of the said registers are hereby authorized and required to do without a special order to that effect: Provided always, that upon the first occasion of completing titles to the said entailed estates the lands acquired to the estate may be introduced into the titles then completed, after which they shall descend regularly as part and portion of the entailed estates.