Issue probably commemorates enclosure of voting place introduced in 145 BC by moneyer's ancestor Licinius Crassus tribune of the Plebs in order to prevent disagreements and favoritism. Other possibilities are: Lex Maria de suffragiis 119 BC which restricted bridges leading to the ballot box in order to prevent from inspecting voting tables and lobbying which was introduced by C. Marius tribune of the Plebs, or lex agraria from 111 BC which should have reconsiled land disputies related to the lex Licinia Sextia from 367 BC, however this would have shifted date of the issue by two years later.