If I wanted to be entirely unambiguous, I'd personally say some thing like "should be sent ahead of ...". Then again, occasionally the ambiguity is irrelevant, it does not matter which convention ruled it, if a bottle of milk mentioned "Best f used by August tenth", you couldn't get https://zaneeytyf.wikirecognition.com/1654181/new_step_by_step_map_for_lumber_for_sale_cheap