"Cavalier" and "croupier" are legal terms not appearing in English-speaking parts of the world, except for Quebec and Louisiana that use a Civil Code.

The Louisiana law "permits each partner to join with him someone to share with him the risks and benefits of his share. There is then formed a little partnership of a subordinate character between such partner and the third person with whom he contracts, without the other partners being entitled to benefit from, or being liable on such contract as to which they are strangers (Art. 1861). The third person thus associated in a subordinate way with the operations of the partnership is called a "croupier." [fn.16]

[fn.16:] The use of this word in card or dice games is very old. It is an allusion to the habit which people who formerly travelled by horse had, when carriages were rare and the roads bad, of picking up riders on the crupper to render them a service.

2 Planiol, Civil Law Treatise No. 1975 (La. State Law Institute transl. 1959). When a partner elects to share his interest in the partnership with a third person, he cannot thereby establish any relationship between the third person and the partnership or the other partners. The latter remain "strangers" to and insulated from liability due to the fact that the little subordinate partnership is formed strictly between the partner and the third person. In short, the third person is taken on as a "croupier" only by the partner with whom he contracts and he rides only on that partner's "crupper." Consequently, Article 2812 does not authorize a partner to create partnership obligations to a third person by sharing his partnership interest with a third party. See Morris and Holmes § 2.08 at 68-74. Thus, the majority opinion errs in relying on Article 2812 to support its theory that Terry Smith created and transferred a capital interest in Creative Development because Article 2812 contemplates merely the sharing of a partner's existing share in the partnership.(65)"

http://caselaw.lp.findlaw.com/cgi-bin/getcase.pl?court=5th&n...

The new concept of partnership in Quebec law has called for a change ..... transfers, croupier agreements, and hypothecs (1.1.1.2.1.). They may also be ...
www.apff.org/_site/DOCUMENTS/PDF/HARMONISATION_RECUEIL-2005...

In general:
"Si le texte est régi par le droit français...l’exercice consistera à rendre compréhensibles en langue anglaise des notions juridiques qui sont celles du droit français. Des termes peu fréquents devront être explicités afin d’être compréhensibles pour un lecteur peu familier avec le droit français. Prenons le cas de la " convention de croupier ", c’est-à-dire le contrat par lequel un associé convient, sans avoir obtenu l’accord de ses coassociés, de partager les bénéfices et les pertes résultant de sa participation dans une société. Une traduction littérale donnerait à penser que le contrat en cause porte sur l’exploitation d’une maison de jeux. La seule solution correcte sera de reprendre le terme français en italique, et de le faire suivre, entre parenthèses, de la traduction en anglais de son explication. La même règle s’appliquera aux termes renvoyant à des institutions juridiques spécifiquement françaises.

Suggestion: "cavalier" (active partner)