Sure. I can defer to the officials, but “testing” is obviously for whether substances are toxic or not or what the effect is. The “assessment” is in terms of the minimum quantities, so it's assessing the quantities and doing more of a full assessment on them. It's essentially the same thing; it's just expanding on it. However, if one of the officials would like to add and clarify that, that's fine too.
On February 2nd, 2023. See this statement in context.