1. What is the primary legislation governing registration of title in your system?

From the highest to the lowest level:
Civil Code (articles 3:16 – 3:31).
Kadaster Act
Governmental regulation (Kadasterbesluit)
Ministerial regulation (Uitvoeringsregeling Kadasterwet)
Regulation of the Board of the Kadaster (Kadasterregeling)

2. Are there specific rules and forms for registration directly provided for in statute under secondary legislation?

There are specific rules regarding registration in secondary legislation.

3. How often do changes arise in property/conveyancing legislation and registration legislation respectively?

Big changes in property/conveyancing legislation are scarcely made. Let’s say once in every 5 years.
Little changes occur more often, let’s say two times a year.