Senate amendment makes the following changes to the 4th edition.

Modifies the proposed directive regarding the Environmental Management Commission's implementation of the Neuse River Basin Riparian Buffer Rule (Rule). Expands the directive to also include implementation of the proposed readoption and recodification of the Rule adopted by the Environmental Review Commission (ERC) on March 14, 2019, and approved by the Rules Review Commission on May 16, 2019, now together referred to as the Neuse River Airport Rules (Rules). Changes the definition of Airport Facilities to instead reference the definition adopted by the ERC on March 14, 2019. Now requires the ERC to implement the Rules by using the definition of Airport Facilities set forth (which is identical to the previously provided definition of the term by the act) instead of the definition adopted by the ERC on March 14, 2019. Requires the ERC to adopt rules to amend the Rules consistent with the implementation provisions of the act. Eliminates the previous implementation provisions that exempt certain airport facilities based on the size of impact from certain provisions of the Rule.