The Commission may require, as a permit condition, that the performance and observance of the order of conditions be secured by one or both of the following methods.
A. 
The Commission may require, as a permit condition, that the performance and observance of the order of conditions be secured by a bond or deposit of money or negotiable securities in an amount and form determined by the Commission to be sufficient to secure the completion of all conservation measures specified in its order of conditions; and the Commission may require that the applicant specify the time within which such construction shall be completed.
B. 
The penal sum of any such bond shall bear a direct and reasonable relationship to the expected costs, including the effects of inflation, necessary to complete the sub-work. Such amount or amounts shall be from time to time reduced as necessary, in the determination of the Commission, to reflect the actual expected costs of the work remaining to be completed.
The Commission may require, as a permit condition, that the performance and observance of the order of conditions be secured by a covenant, executed and duly recorded by the owner of record, running with the land, whereby such conservation measures as are stated in the order of conditions shall be provided before any lot may be built upon or conveyed.
The deposit of monies, negotiable securities, bond or covenant shall, in the case of the bond, be given to the Town Treasurer, and in the case of a covenant, be recorded in the Registry of Deeds or Land Court, as the case may be, within 14 days of the granting of the order of conditions.