The following words or phrases have the following meanings in this subchapter unless the context clearly indicates otherwise:(1) Affected person--A person who has a personal justiciable interest related to a legal right, duty, privilege, power, or economic interest affected by the application. An interest common to members of the general public does not qualify as a personal justiciable interest. The determination of whether a person is affected shall be governed by §55.256 of this title (relating to Determination of Affected Person).(2) Marine seawater--Water that is derived from the Gulf of Mexico for desalination.(3) Seawater--Water that is derived from a bay or arm of the Gulf of Mexico for desalination and use solely for industrial purposes.(4) Three-mile seaward boundary--The three nautical mile boundary developed by the Texas General Land Office for the Dispersant Use Pre-Approval Zone.