Final answer:
Option B, 'Having CPR level A before applying', is not a mandatory requirement for obtaining a security licence, though other requirements like a clean criminal record and eligibility to work are typical.
Step-by-step explanation:
To answer the question regarding what is not a mandatory licensing requirement for applicants to obtain a security licence, option B - 'Have CPR level A before applying for a security license' is not universally required for obtaining a security license. Although having CPR training can be highly beneficial and is often recommended, it is not always a mandatory requirement for licensing. Requirements for a security license typically include having a clean criminal record, being legally eligible to work in the jurisdiction where the license is issued, and having successfully completed any necessary training and testing.