All credit unions which have been heretofore legally organized under chapter thirty-six of the acts of the Legislature of one thousand nine hundred twenty-five, and which are in existence on the effective date of this section; and all credit unions which have been heretofore legally organized under article ten of chapter thirty-one of the Code of West Virginia, 1931, as amended, and which are in existence on the effective date of this section, shall upon the effective date of this section be considered to have been organized under the provisions of this article, and shall not be required to obtain a new charter or to reorganize hereunder. All acts and things done by any such credit unions, insofar as such acts and things shall not have constituted any violation of law as it shall heretofore have existed, shall be deemed valid and effective.