After receipt by the Commissioner of the papers specified in Section 25, he shall approve or disapprove the plan of conversion. The Commissioner shall not approve the plan of conversion unless he shall be of the opinion and finds:
If the Commissioner disapproves the plan of conversion, he shall state his objections in writing and give an opportunity to the converting bank or insured savings association to amend the plan of conversion to obviate such objections. The conversion, unless a later date is specified in the plan of conversion, shall become effective upon the Commissioner's approval and the charter proposed in the plan of conversion shall constitute the charter. The Commissioner shall issue a certificate of conversion which shall specify the name of the converting bank or insured savings association, the name of the resulting bank, and the charter provided for by said plan of conversion. Such certificate shall be conclusive evidence of the conversion and of the correctness of all proceedings therefor in all courts and places, and such certificate shall be recorded.
205 ILCS 5/26