25.1521(25.72), 25.1527(25- 105), 25.1529(25-54), 25.1543(25-72), 25.1549(25.40), 25.1551(25-72), 25.1557(25-72), 25.1581(25-72), 25.1583(25-105). Subpart - Electrical Whine interconnection Systems (EWIS): 25.1701(25.123), 25.1703(25-123), 25.1705(25-123), 25.1707(25-123), 25.1709(25-123), 25.1711(25-123), 25.1713(25-123), 25.1715(25-123), 25.