All Isle of Man legislation is available on https://legislation.gov.im/
Some of the more relevant FIU legislation is below -
Financial Intelligence Unit Act 2016
Financial Intelligence Unit (Tipping Off) Regulations 2018
Proceeds of Crime (Prescribed Disclosures) Order 2015
Anti-Terrorism and Crime Act 2003
The FIU cannot provide legal advice, should you have questions in relation to the interpretation of the above legislation we recommend you seek appropriate legal advice.