Proposition C, a measure requiring registration fees and monthly reports from expenditure lobbyists, was approved by voters in San Francisco. The measure creates a new category of lobbyists, termed expenditure lobbyists, defined as organizations who employ lobbyists to influence city officials.

The measure imposes a registration threshold of $2,500 or more in a calendar month spent soliciting, requesting, or urging other persons to communicate directly with a city official. Expenditure lobbyists must pay a $500 fee to register with the city.

The measure takes effect February 1, 2016.