Art. 49 BV; church taxes; legal persons and freedom of belief and conscience; Art. 49(6) BV may be invoked only by physical persons, because the guarantee of religious freedom presupposes belief and conscience. Legal persons cannot directly derive from this constitutional provision an exemption from cult taxes, save for any extension that may later be established by the contemplated federal implementing legislation. A complaint concerning a recurring annual tax may nevertheless be examined on the merits despite possible mootness of the individual year, where the underlying liability question remains relevant (consid. 1-2).