Rule order in tax rules

Hi

We have multiple tax rule types and within each tax rule type we have tax rules.

Now suppose under rule type determine tax rate i have a rule say rule_1 with rule order 10 and in tax rule type determine tax applicibality i have a rule say rule_2 with rule order 100.

so in this case which rule will be first invoked by tax engine ..rule_1 (with order 10) or rule_2 (with rule order 100).

Idealliy the rule type determine tax applicability should be evaluated before finding the tax rate so rule_2 should be invoked first but please let me know how oracle behaves.