Good administration is what makes segregation hold up. Each portfolio should have its own name used consistently in contracts, invoices and account titles, its own ledger and its own valuation. Directors should minute which portfolio each decision concerns, and any assets that belong to the company as a whole, rather than a portfolio, should be recorded separately as general assets.
Most SPCs appoint a licensed administrator to keep records, calculate net asset values and handle investor subscriptions and redemptions. An auditor reviews the accounts each year, and regulated SPCs file returns with their supervisor.
Before forming one, it is worth comparing alternatives. A simple holding company with separate subsidiaries can give similar separation with more familiar banking, while a single fund with share classes may suit managers who do not need liability segregation. The right choice depends on investor expectations, the cost of administration and how institutions in your target markets view the structure.