Northern Ireland tenancy deposit: what are the 28-day and 35-day rules?

In Northern Ireland, a private landlord or agent must protect the tenancy deposit in an approved scheme within 28 days of receiving it. They must then give the tenant the required written information about the protected deposit and scheme within 35 days. Official source: nidirect Tenancy Deposit Scheme. Guide: https://getinstantlaw.com/uk/northern-ireland/landlord-tenant