(a) Within the shoreline buffer, when the removal of storm-damaged trees results in a cleared opening in the tree canopy greater than 250 square feet, replanting is not required, but the area shall be required to naturally revegetate, and the following requirements must be met:
 

[1] The area from which a storm-damaged tree is removed does not result in new lawn areas, or other permanently cleared areas;

[2] Stumps from the storm-damaged trees may not be removed;

[3] Limbs damaged from a storm event may be pruned even if they extend beyond the bottom 1/3 of the tree; and

[4] If, after one growing season, no natural regeneration or regrowth is present, replanting of native tree seedlings or saplings is required at a density of one seedling per every 80 square feet of lost canopy.

(b) Outside of the shoreline buffer, if the removal of storm damaged trees exceeds 40% of the volume of trees four inches or more in diameter, measured at 4.5 feet above the ground level in any ten-year period, or results, in the aggregate, in cleared openings exceeding 25% of the lot area within the shoreland zone or 10,000 square feet, whichever is greater, and no natural regeneration occurs within one growing season, then native tree seedlings or saplings shall be replanted on a one-for-one basis.