BGB §§ 134, 138 Abs. 1-2, §§ 157, 307 Abs. 3 S. 1, § 779 Abs. 1, § 812 Abs. 1 S. 1 Alt. 1, § 1643 Abs. 1, § 1822 Nr. 7; GG Art. 12 Abs. 1; TzBfG § 15 Abs. 4; JArbSchG §§ 2, 5