Section 4. On or before the first day of October of the year in which an assessment is made pursuant to the provisions of section nine A, the director shall certify to the commissioner of revenue the amount of the assessment to be made and the name and address of each company against whom such assessment is made. Such assessments shall be collected by said commissioner in accordance with applicable provisions of chapter sixty-three; provided, however, that each such company shall pay the amount assessed against it within thirty days from the receipt of notice of assessment from said commissioner. The amount so collected shall be credited to the General Fund.