Removal of trees.

Not more than one-fifth of the total number of trees in any forest reservation may be removed in any one year, excepting in cases where the trees die naturally. [S13, §1400-e; C24, 27, 31, 35, 39, § 2608; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §161.4 ] C93, §427C.4