Amends GS 105-187.51B(a)(5) concerning privilege taxes on a company located at a ports facility for waterborne commerce, making clarifying and organizational changes and also adding language that requires a tax to be imposed on those such companies that purchase parts, accessories, or attachments used to maintain, repair, replace, upgrade, improve, or otherwise modify the machinery and equipment which is also subject to the privilege tax pursuant to this section.

Effective July 1, 2013, applies to purchases made on or after that date.