Which of the following scenarios would require immediate notification to tenants regarding entry into their property?

Immediate notification to tenants regarding entry into their property is necessary in emergency repair situations because these situations typically involve urgent issues that could affect the safety, health, or welfare of the tenants. For example, if there is a gas leak, flooding, or a broken heating system in extreme weather, the landlord must act quickly and may need to enter the property without advance notice to address the issue and ensure the tenant's safety.

In contrast, routine maintenance work, security checks, and scheduled inspections usually do not require immediate notification. These activities are typically planned in advance and can be communicated to tenants with proper notice as defined by law or lease agreements, allowing tenants to prepare for the entry. Emergency repairs stand apart due to their urgency and the potential consequences of delay. Therefore, the distinction lies in the immediacy and nature of the repair needed when it comes to notifying tenants.