4. The Authority may establish procedures, rules and guidelines specifying the content of such notifications and any requirements, procedures and conditions related to the approval of a merger or acquisition described in paragraph 1 of this article. 5. An approval or refusal pursuant to this article shall be subject to paragraph 4 of article 19. CHAPTER VII SIGNIFICANT MARKET POWER Article 36 Significant market power and market review 1. Subject to paragraph 3 of this article, the Authority shall at least every two years review the relevant telecommunications markets listed in Annex 2 of the present Decree-Law, following which it may: a) Designate any service provider as having significant market power in accordance with paragraph 3 of this article in the relevant telecommunications market or markets reviewed; and b) Remove the significant market power designation from a given service provider in a relevant telecommunications market. 2. The Authority may add new or remove existing relevant telecommunications markets to or from the list in Annex 2. 3. The Authority may designate a service provider as having significant market power in a telecommunications market if the service provider, individually or together with others, enjoys a position of economic strength enabling it to behave to an appreciable extent independently of competitors and users in that telecommunications market. 4. In conducting any review pursuant to paragraph 1 of this article, the Authority shall review such markets taking into account: a) Existing competition, including market shares of relevant service providers and barriers to their expansion; b) Potential competition, including the market quotas of the relevant service providers and the barriers to its expansion; c) The bargaining power of consumers and/or users; and d) The evolution of effective competition in Timor-Leste and other countries, including, without limitation, those comparable to Timor-Leste in terms of population, geography, income and other relevant features.