Complex sentence: If an external context allows a person to integrate regulations they must feel competent, related, and autonomous, and they must understand in terms of their other goals the regulation in order for a sense of autonomy to be facilitated.
Split into simpler sentences: If an external context allows a person to integrate regulations they must feel competent, related and autonomous. They must also understand in terms of their other goals the regulation in order for a sense of autonomy to be facilitated.