The Italian city of Venice announced new limits Saturday on the size of tourist groups, the latest move to reduce the pressure of mass tourism on the famed canal city. Starting in June, groups will be limited to 25 people, or roughly half the capacity of a tourist bus, and the use of loudspeakers, “which can generate confusion and disturbances,” will be banned, the city said in a statement.

The city official charged with security, Elisabetta Pesce, said the policies were aimed at improving the movement of groups through Venice’s historic center as well as the heavily visited islands of Murano, Burano and Torcello. The city previously announced plans to test a new day-tripper fee this year. The 5 euros ($5.45) per-person fee will be applied on 29 peak days between April and mid-July, including most weekends.