He published two actual code of laws, these supported his practical work. I'm gonna present you with two long lists, with a couple of comments.
First Book of Law:
1. about the sanctity Church possessions (so no lay could rob/tax the Church lands)
2. about the power of bishops over Church possessions, settling relations with laymen
3. about witnesses and prosecutors of the Church (this is a short one, they have to be married, with family, and true followers of Christ)
4. similarly (this one takes the justice over priests from the hands of layman, what is Church business shall remain as Church business)
5. about the work of priests (laymen should help the work of theirs at all cost)
6. about the sanctity of private possessions and last will
7. about the sanctity of royal possessions
8. keeping the Sunday (mandatory rest)
9. similarly (ordering everyone to go to church on Sundays, except those who are guarding the fire - interesting implications this one has, I think I wrote about this already however)
10. keeping the fasts (like lent and such, the larger fasting periods)
11. keeping the Friday (the fast on Friday)
12. about those who die without confession (no Church funeral for him; except those who died suddenly so had not had the opportunity to get a priest)
13. keeping Christianity (priests should sanction those who lack in religious fervor, if anything fails these faithless have to face the royal court)
14a. about murder (110 gold fine, plus penitence by Church law)
14b similarly (killing someone by accident - 12 gold, plus penitence by Church law)