Requirement of an oral hearing

(1) The authority decides after an oral hearing. For this the parties must be summoned in writing with a reasonable period of notice. The summons must point out that, should a party fail to appear, the matter may be heard and decided even without that party. Where more than 50 summonses are to be made, they may be replaced by public notice. Public notice is effected by the hearing date being made known at least two weeks beforehand in the authority's official gazette and additionally in local daily newspapers circulating in the area in which the decision is expected to have effect, with the indication under the third sentence. For the period under the fifth sentence, notice in the official gazette is decisive.
(2) The authority may decide without an oral hearing where 1. an application is granted in full with the agreement of all parties; 2. no party has raised objections to the intended measure within a period set for this purpose; 3. the authority has informed the parties that it intends to decide without an oral hearing, and no party has raised objections to this within a period set for this purpose; 4. all parties have waived it; 5. an immediate decision is necessary because of danger in delay.
(3) The authority should further the procedure such that it can, where possible, be concluded in one hearing.