Desk research against primary sources, with the issuing authority linked where a page states an official fee, rule or deadline.
Zero tolerance means the law does not distinguish between quantities, intent, or where the substance was consumed — a trace amount from legal use abroad that shows up in a bloodstream test is treated the same as possession discovered locally, because the test result is the evidence, not the circumstances behind it. There is no threshold below which a positive result is disregarded.
The absence of a medical exception means a prescription valid in your home country carries no weight here; CBD marketed as legal or non-psychoactive elsewhere is judged by what is actually in the product, not by its label. With a minimum of 4 years imprisonment attached to first offences, the safest assumption when travelling is that nothing in this category should come with you, rather than relying on a home-country legal status to translate.