Each Territorial Public Defender, including the Chief Territorial Public Defender, shall receive in full compensation for his services an amount to be determined by the Territorial Public Defender Administration Board; Provided, however, That the salary of a Territorial Public Defender shall not exceed the salary of the Chief Territorial Public Defender. Salaries for clerical and investigative staff shall be determined by the Chief Territorial Public Defender. The Chief Territorial Public Defender shall recommend to the Territorial Public Defender Administration Board such assistants as may be necessary. The Chief Territorial Public Defender shall prepare and submit an annual budget for salaries and expenses of the Office of the Territorial Public Defender to the Legislature.