The Isle of Man Companies Act 1974 can be found here.

There’s a bit more meat in this one.

It deals with:

S1. Holding and subsidiary companies.
S2. Membership of holding company.

S4. Requires Public Companies to maintain a register of substantial shareholders and requires those shareholders to make certain notifications to the Company – say – for example, their interest increases above a certain level (eg 3%)

S10 and 10a Deal with the keeping of registers in both paper and computerised form.