The board shall issue an order adopting or revising a development plan and/or, if applicable, rezoning the property or granting variances or other necessary relief from ordinances of a political subdivision, if, after the hearing(s), the board determines that local ordinances, rules, zoning or land use regulations, and/or an existing development plan are detrimental to the best interests of the state. The board shall issue its order in writing within 15 days following the final hearing. Final orders, minutes of the hearing, and material submitted to the board for consideration shall be open to the public in accordance with the Open Records Act, Government Code, Chapter 552, §§552.001 et seq.