All broadcasters must abide by the rules regulating advertising contents. The regulatory authorities developed joint guidelines based on the stipulations of the Interstate Broadcasting Treaty which apply to all national services. They include, among other things, rules for the insertion and the amount of advertising in broadcasts, the separation of advertising from other contents, and for sponsoring.

The Commission on Licensing and Supervision (ZAK) ensures that the relevant rules are applied vis-à-vis all national broadcasters. As regards broadcasts transmitted only locally or in one particular region or state, it is up to the respective authority to check that their licensees properly apply the advertising rules.