The Belgian privacy law protects vital records as follows:
Death records: 50 years;
Marriage records: 75 years;
Birth records: 100 years;
Census: 120 years.
The fact that records are officially available to the public doesn't mean that all documents have already been scanned, put online, indexed, or even physically available in every town hall or archive, thus it may depend on the town where the records were issued. The national archives are busy having a lot of records scanned (in cooperation with Familysearch Latter-Day-Saints Org) but larger cities and towns are scanning themselves. However, records are still mostly released in batches of 10-year-periods. Researching very recent information (more recent than the ones protected by the law) and obtaining copies of these records is to be performed by the local City Clerk's services, mostly against payment, and allowed only if you (or proxy) can prove to be a direct descendant.