Dozens of clowns marched in protest in Bolivia's capital.
The new school mandate restricts events that provide income for clowns.
Protests highlight the impact of government policies on livelihoods.
Briefing: Sad faces all round as Bolivia’s clowns protest over decree threatening their livelihoods
Strategic angle: Clowns in Bolivia are rallying against a new decree that jeopardizes their income by limiting performance opportunities.