(12) Maritime, land and air transportation, and communications. The autonomous government shall, however, have the power to grant franchises, licenses and permits to land, sea and air transportation plying routes in the province or cities within the region, and communications facilities whose frequencies are confined to and whose main offices are located within the autonomous region; (13) Patents, trademarks, trade names, and copyrights; and (14) Foreign trade. SEC. 4. Composition of the Regional Assembly. - The Regional Assembly shall be composed of members elected by popular vote, with three (3) members elected from each of the legislative districts. There shall also be sectoral representatives in the Regional Assembly whose number shall not exceed fifteen percent (15%) of the total number of elected members of the Regional Assembly coming from the agricultural, labor, urban poor, differently able, indigenous cultural communities, youth, and women sectors. SEC. 5. Inhibitions against Members of the Regional Assembly. (1) No Member of the Regional Assembly may hold any other office or employment in the Government, or any subdivision agency, or instrumentality thereof, including government-owned or controlled corporations or their subsidiaries, during his/her term without forfeiting his/her seat. Neither shall he/she be appointed to any office which may have been created or the emoluments thereof increased during the term for which he/she was elected. (2) Members of the Regional Assembly are prohibited from (a) personally appearing as counsel before courts of justice or quasi-judicial and other administrative bodies; (b) directly or indirectly, being interested financially in any contract with, or in any franchise or special privilege granted by the national government or by the regional government, or any subdivision, agency or instrumentality thereof, including any government-owned or-controlled corporation or its subsidiary, during his/ her term of office; (c) intervening in any manner before any office of the government for his/her pecuniary benefit or where he/she may be called upon to act on account of his/her office. SEC. 6. Legislative Inquiries. - The Regional Assembly or any of its committees may conduct inquiries or public consultations in aid of legislation in accordance with its rules. (1) In connection therewith, it shall have the power to issue subpoena or subpoena duces tecum to compel the attendance of and the production of papers, documents, or things by witnesses or persons under investigation by the assembly, itself, or by any of its committees; 11