English to French Other Law: Contract(s) Golf membership agreement

Il s'agit d'une convention d'adhésion à un golf.
Le problème est que parfois ce terme signifie date d'entrée en vigueur et parfois date d'ouverture du golf, ou c'est mon impression. Est-ce qu'il peut avoir 2 significations/traductions différentes ?
Voici 3 exemples trouvés dans le texte:

The Owner has legal title to the Golf Club, which it will operate for its sole risk and benefit as a going concern on and from the Commencement Date.

[...]

Annual Fee: means the individual and collective (as the context may require) annual membership fees payable by a Member for himself and each of the Family for the Membership which will commence on and from the Commencement Date.

[...]

Financial Year: means initially the Commencement Date to 31st December of that year, and thereafter from the 1st January to 31st December for every year thereafter.