residential, and to provide service on the basis of such classification; Provided further that all persons within a given class shall be provided with service on a non-preferential, firstcome, first-served basis. Complaints of unfair competition. 7.(1)The Commission may, on its own motion or upon a complaint, investigate any licensee whom it has reason to believe or is alleged to have committed any act or omission, or to have engaged in a practice, in breach of fair competition or equal access. (2) Any person with a complaint regarding breach of fair competition or equal access against any licensee may lodge such a complaint with the Commission. (3) Where it appears to the Commission that a breach of fair competition or equal access has been committed, the Commission may investigate the act or omission and give written notice to the licensee(a) informing him that the Commission is investigating a possible breach of fair competition or equal access; (b) stating the matters consulting the contravention or breach, including any matter of facts or law which are relevant to the investigation; (c) requiring the licensee to furnish the Commission with information required in order to complete the investigations; and (d) of the appropriate steps to be taken in order to remedy the breach. (4) The licensee shall, within 30 days from the date of the notice, make representations in response to the notice and shall give the Commission all information in his possession required under the notice. (5) Any person affected by the contravention or 18