If, after this Act comes into effect, a person prescribed in the preceding paragraph is detained pursuant to the provisions of Article 55, paragraph (4) or (5) of the Immigration Control Act Prior to Amendment by Article 2, to which the provisions then in force continue to govern pursuant to the provisions of paragraph (2) of the following Article, and no plan for departure has been prepared for that person pursuant to the provisions of the preceding paragraph, an immigration control officer must, promptly after the commencement of that detention, prepare a plan for departure in conformity with the provisions of Article 52-8, paragraph (1) of the Immigration Control Act as Amended by Article 2.