4B [Issues excluded (the CISG does not govern the issue of joint liability or the assignment of obligation)];

59A [Payment due at time fixed or determinable by contract or Convention];

59B [No need for request by seller or other formality];

62A ; 62A1 [Seller may compel performance of any of buyer's obligations unless seller has exercised inconsistent remedy];

78A ; 78B [Interest on delay in receiving price or any other sum in arrears; Rate of interest]