Notices and orders issued pursuant to Sections 42 through 45 of this act¹ shall set forth with reasonable specificity the nature of the violation and the remedial action required, the period of time established for abatement, and a reasonable description of the portion of the surface coal mining and reclamation operation to which the notice or order applies. Each notice or order issued under this section shall be given promptly to the permittee or his agent by the Department and all such notices and orders shall be in writing and shall be signed. Any notice or order issued pursuant to this section may be modified, vacated or terminated by the Department. Any notice or order which requires cessation of mining by the operator shall expire within thirty (30) days of actual notice to the operator unless a public hearing is held at the site or within such reasonable proximity to the site that any viewings of the site can be conducted during the course of public hearing.