"Corso legale e prescrizione delle monete di nichelio puro, a contorno liscio, da centesimi cinquanta"

This procedure concerns the legal tender status and the expiration date for the use of pure nickel coins with smooth edges valued at 150 centesimi. It establishes the timeframe during which these specific coins remain valid for payments within the national currency system. This affects individuals and businesses holding these specific coins, as it defines when they will no longer be accepted as legal payment for debts or transactions.