The expectations that a college has for its students, in terms of conduct and behavior, are presented in something called a "student handbook". Faith-based colleges, like any other college, will have a student handbook that outlines their expectations for their students.
While many rules between different Faith-based colleges are similar, each college will likely have unique rules or methods of enforcement, so it's important that students read their college's student handbook entirely. It is common for Faith-based colleges to have some rules about dress code and conduct that reflect Biblical ideals of modesty and relationships. A common example is a modest dress code and restrictions for certain kinds of public displays of affection between men and women.
The student handbook will also contain rules about dorms, open hours, academic integrity, and general conduct between individuals. The key idea is to promote a campus environment that reflects the college's values, beliefs, and mission. Additionally, the rules serve to create a safe and respectful learning environment. As stated, each college will have their own unique set of rules and requirements in their student handbook.
Most colleges will have a copy of the student handbook on their website and may require students to sign or "check" to acknowledge that they have read and agree to follow the rules before they begin classes or move into their dorm. Check the website of the Faith-based college(s) you are interested in or inquire with their admissions departments to find specifics on their rules and requirements.