An accounting period shall be twelve months except in the following cases where it may be less than twelve months: 1. a newly incorporated company or juristic partnership may elect to use the period from its incorporation date to any one date as the first accounting period. 2. a company or juristic partnership may file a request to the Director-General to change the last day of an accounting period. In such a case, the Director-General shall have the power to grant approval as he deems appropriate. Such an order shall be notified to the company or juristic partnership who files the request within a reasonable period of time and in the case where the Director-General grants the permission, the company or juristic partnership shall comply to the accounting period as prescribed by the Director-General