What must a system owner do, once the threshold leak rate has been exceeded on any low-pressure system using an ozone-depleting refiigerant?

A procedure according to the norms.

Explanation:

If possible, proceed to fix the leak in no more than 30 days from the moment it was discovered.

Otherwise, during the first 30 days develop a planification to backfit the leak or, if needed, retire the appliance. This should be executed within one year.