You may even find that your company's stated beliefs don't match real-life operations. In the long run, your comfort level will depend on how well your personal beliefs and values match the company's. Not knowing this information could get you nailed later on, and you'll never think you were doing something wrong. The best way to find out how serious management is about written rules is to ask your coworkers. Needless to say, it's best to find the answers to questions like these beforehand, not by direct experience.
Some unwritten rules are a matter of personal and business ethics.
These include personal business conducted on company time, personal use of company supplies and equipment, office romances, and other matters involving personal judgement and ethics. Taking Time Off Attitudes toward aspects of your personal life, such as taking time off for doctor's appointments, family events, or personal errands, can vary widely from company to company. Some employers are quite liberal and don't mind so long as you make up the time, while others require that you charge every quarter hour against leave time. Sometimes these decisions are left up to your manager. You'll eventually find out where your company stands, but during your first three months try to keep requests for time off to a minimum.