Within sixty days after the discovery of oil or gas in a pool not then covered by an order of the department, a hearing shall be held and the department shall issue an order prescribing development units for the pool. If sufficient geological or other scientific data from drilling operations or other evidence is not available to determine the maximum area that can be efficiently and economically drained by one well, the department may establish temporary development units to ensure the orderly development of the pool pending availability of the necessary data. A temporary order shall continue in force for a period of not more than twenty-four months at the expiration of which time, or upon the petition of an affected person, the department shall require the presentation of such geological, scientific, drilling, or other evidence as will enable it to determine the proper development units in the pool. During the interim period between the discovery and the issuance of the temporary order, permits shall not be issued for the drilling of direct offsets to a discovery well.