Complex sentence: The laws regulated where, when, and for how long a person could remain outside their homeland, and made it compulsory for all black South Africans over the age of 15 to carry a "pass book" at all times.
Split into simpler sentences: The laws regulated where, when, and for how long a person could remain outside their homeland. They also made it compulsory for all black South Africans over the age of 15 to carry a "pass book" at all times.