This is from the County of Santa Clara web page:
It shall be unlawful for any person to operate or use a bicycle propelled wholly or in part by muscular power within the unincorporated territory of the County unless said bicycle is registered, licensed and equipped as provided herein. A bicycle means any device upon which a person may ride, which is propelled by human power through a system of belts, chains or gears and which has wheels at last 20 inches in diameter and a frame size of at least 14 inches.
(Code 1954, § 10.7.1-1; Ord. No. NS-1004.64, § 1, 5-23-60; Ord. No. NS-1004.114, § 4, 10-21-75)
So do I need to get a license sticker slapped onto my bike?