Under the Constitution, FATA is included among the territories of Pakistan (Article 1). It is represented in the National Assembly and the Senate but remains under the direct executive authority of the President. Each tribal agency is administered by a Political Agent (PA), assisted by a number of Assistant Political Agents (APA), Tehsildars (administrative head of a tehsil) and Naib Tehsildars (deputy tehsildar), as well as members from various local police (khassadars) and security forces (levies, scouts). As part of his administrative functions, the Political Agent oversees the working of line departments and service providers. He is responsible for handling inter-tribal disputes over boundaries or use of natural resources, and for regulating trade in natural resources with other agencies or settled areas.