4 When the Chief of Regional Maritime Bureau deems the amounts of fees reported in accordance with the provision of paragraph 1 to be unconformable to the provision of paragraph 2, or when he finds that the complaint referred to in the preceding paragraph is not frivolous, he shall hold a public hearing at the date and place which he shall notify, in advance, to the marine procedure commission agent concerned, in order to give the said marine procedure commission agent a full opportunity to be heard and present testimony to the effect that the amounts of fees are not against the standards set in paragraph 2. At the conclusion of hearing, if the Chief of Regional Maritime Bureau finds that the complaint has been justified, he may order the said marine procedure commission agent to alter the amounts of fees, furnishing him with the reasons therefor.