Constitutional practicability of referendum on EU Constitution

No. Binding referendum requires implementation by constitutional amendment. Consultative referendum can anyhow be held if ordered by ad-hoc-law.

Regulation about a special transference of power to EU

none

Approval of transfer of sovereignty without effect of constitutional amendment

Majority of members from both chambers, Art. 167 § 2, 53 ConstBelgium.

Approval of transfer of sovereignty with effect of constitutional amendment

Not expressly regulated, but constitutional amendment required.

Approval of constitutional amendment

Majority of at least 2/3 of votes from both chambers by presence of at least 2/3 of their members after disbandment of both chambers and their re-election, Art. 195 ConstBelgium.

Other constitutional regulations about referendums

none