Unit option schemes require detailed terms, trustee safeguards and mandated disclosures under InvIT regulations. The regulations require trust deeds to specify trust identity, objects, settlor, schemes, beneficiaries, use of funds, trustee details and powers; trustees must administer schemes, maintain accounts and protect beneficiary interests. The nomination and remuneration committee must set scheme terms covering option quantum, vesting and lapse conditions, exercise periods, post termination rights, adjustments for corporate actions and treatment of long leave employees. Prescribed disclosures, filings and annual report/website reporting must detail scheme mechanics, option movements, valuation methods, trust unit transactions and specified risk disclosures, with undertakings by the investment manager on accounting and compliance.