Lex Iulia de Civitate Latinis Danda (90 BC)

Lex Iulia de Repetundis (59 BC)

Lex Iulia Municipalis (45 BC)

Augustus' laws on marriage and other moral topics (18 - 17 BC)

Lex Iulia de Ambitu (18 BC): Penalising bribery when acquiring political offices. ; Lex Iulia de Maritandis Ordinibus (18 BC) : Limiting marriage across social class boundaries (and thus seen as an indirect foundation of concubinage, later regulated by Justinian, see also below).

Lex Iulia de Adulteriis Coercendis (17 BC) : This law punished adultery with banishment. The two guilty parties were sent to different islands ("dummodo in diversas insulas relegentur"), and part of their property was confiscated. Fathers were permitted to kill daughters and their partners in adultery. Husbands could kill the partners under certain circumstances and were required to divorce adulterous wives. » Augustus himself was obliged to invoke the law against his own daughter, Julia (relegated to the island of Pandateria) and against her eldest daughter (Julia the Younger). Tacitus adds the reproach that Augustus was stricter for his own relatives than the law actually required (Annals III 24)

Another law that came into existence under Augustus' reign, actually in 9 CE, the Lex Papia Poppaea, is usually seen as an integral part of Augustus' Julian Laws. The Lex Papia Poppaea also explicitly promoted offspring (within lawful marriage), thus also discriminating against celibacy.

Later updates to the Julian laws

Ulpian (3rd century)

The Lex Julia relating to marriage : (Epitome 13-14) By the terms of the Lex Julia, senators and their descendants are forbidden to marry freedwomen, or women who have themselves followed the profession of the stage, or whose father or mother has done so; other freeborn persons are forbidden to marry a common prostitute, or a procuress, or a woman manumitted by a procurer or procuress, or a woman caught in adultery, or one condemned in a public lawsuit, or one who has followed the profession of the stage....

Justinian (6th century)

The Lex Julia on adultery : (Institutes 4, 18, 2-3) Public prosecutions are as follows....the Lex Julia for the suppression of adultery punishes with death not only those who dishonour the marriage bed of another but also those who indulge in unspeakable lust with males. The same Lex Julia also punishes the offence of seduction, when a person, without the use of force, deflowers a virgin or seduces a respectable widow. The penalty imposed by the statute on such offenders is the confiscation of half their estate if they're of respectable standing, corporal punishment and banishment in the case of people of the lower orders. » (Digest 4, 4, 37) But as regards the provisions of the Lex Julia....a man who confesses that he's committed the offence [for exampleadultery] has no right to ask for a remission of the penalty on the ground that he was under age; nor, as I've said, will any remission be allowed if he commits any of those offences which the statute punishes in the same way as adultery; as, for example, if he marries a woman who is detected in adultery and he declines to divorce her, or where he makes a profit from her adultery, or accepts a bribe to conceal illicit intercourse which he detects, or lends his house for the commission of adultery or illicit intercourse within it; youth, as I said, is no excuse in the face of clear enactments, when a man who, though he appeals to the law, himself transgresses it.

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