It shall be the duty of the Commission to formulate and submit to the City Council plans for the establishment, maintenance, improvement and promotion of a formal Japanese garden. The Commission shall submit to the Council, not less than every 6 months, a report of its progress and recommendations. The Commission may form subcommittees, appoint unpaid advisors, hold public hearings, encourage the interest of other organizations in its objectives, and engage in similar activities which in its judgment may assist it in making recommendations and promoting the plan, establishment, maintenance and improvement of a formal Japanese garden that will be an attraction enjoyed by the people of Portland and their guests.