3. Drafting history Art. 15 CISG can be traced back to Art. 5(1) ULF, but uses clearer terminology than the earlier provision, making a distinction between ‘withdrawal’ (up until receipt) and ‘revocation’ (after receipt), the latter of which is regulated in Art. 16 CISG. Together, these two provisions serve to clarify the distinction between when an offer becomes effective, and when it becomes binding.