From and after the Service of such Notices as aforesaid in relation to any Lands required to be kept free from Buildings and other Obstructions, the following Restrictions, Powers, and Consequences shall attach with reference to such Lands :
No Building or other Structure (other than Barns, Hovels, or other like Structures of Wood,) shall be made or erected thereon :
It shall be lawful for the said Secretary of State, at any Time after the Expiration of Fourteen Days from the Service of such Notice, and from Time to Time, to enter and pull down any present or future Buildings or Structures (other than as aforesaid) thereon, and to cut down or grub up all or any of the Trees thereon, and to remove or alter all or any of the Banks, Fences, Hedges, and Ditches thereon, and to make underground or other Drains therein, and generally to level and clear the said Lands, and do all such Acts for levelling and clearing the same as may be deemed necessary or proper by the said Secretary of State, but in such Manner, nevertheless, that Evidence of the Boundaries of the Lands held by different Owners may be preserved :
And it shall not be lawful for any Person to alter the Level of the Lands, or do any Act which may prejudicially affect any Work done on the Lands under the Authority of the said Secretary of State.
The Powers conferred by the Enactment lastly hereinbefore contained in relation to any Lands shall be exercised only within Three Years after the making of any Declaration that the said Lands are required to be kept free from Buildings and other Obstructions, except with respect to pulling down Buildings or Structures wrongfully made or erected after the Expiration of that Time, or keeping or reinstating such Lands in the Condition in which the same were left after the Execution of any such Work thereon as aforesaid, or maintaining or restoring the Level of such Lands.