Freedom of assembly includes the right to choose the manner in which the assembly is organized. The ECtHR has stated:
Unofficial translation:
In some instances, limitations on the manner of assemblies – such as the use of sound-amplification equipment – may be justifiable. The UN Special Rapporteur,[5] the OSCE-ODIHR Guidelines on Freedom of Peaceful Assembly[6] and the AComHPR’s Guidelines on Freedom of Association and Assembly in Africa[7] emphasize that any such restrictions must meet the tests of necessity and proportionality (see Assembly Section 4.4).