(f) limitations on the participation of foreign capital in terms of maximum percentage limit on foreign shareholding or the total value of individual or aggregate foreign investment. ARTICLE 15 National Treatment 1. In those sectors and modes of supply which shall be liberalised pursuant to Article 16, in line with individual countries' levels of development, and subject to any conditions and limitations stipulated in the State Parties' lists of commitments, each State Party shall grant to services and service suppliers of another State Party, in respect of all measures affecting the supply of services, treatment no less favourable than that it accords to its own like services and service suppliers. 2. A State Party may meet the requirement of paragraph 1 by according to services and service suppliers of another State Party, either formally identical treatment or formally different treatment to that it accords to its own like services and service suppliers. 3. Formally identical or formally different treatment shalt be considered to be less favourable if it modifies the conditions of competition in favour of services and service suppliers of a State Party compared to like services and service suppliers of another State Party. 4. State Parties may maintain conditions and qualifications fo national treatment provided that these conditions and qualifications are set out in their lists of commitments. ARTICLE 16 Progressive Trade Liberalisation 1 State Parties shall enter into successive rounds of negotiations three years after completion of the previous one with a view to achieving an integrated regional market for services. Such negotiations shall be in conformity with Article V of the GATS and aim at promoting economic growth and development for all Member States. 2 State Parties shall negotiate the liberalisation of the six priority services sectors (communication, construction, energy-related, financial, tourism and transport services). Subsequent negotiations shall cover all services sectors subject to Article 3. These negotiations shall also include negotiations under Article 4. 3. This first round of negotiations shall be concluded no later than three (3) years after the commencement of such negotiations. 4 Negotiations shall be in conformity with the principle of asymmetry, reflecting individual State Parties' disadvantages by reason of size, structure, vulnerability and level of development of their economy. 13