A more thorough explanation:

applicando singula singulis

Applicando singula singulis is a Latin phrase that means applying each to each. It was commonly used in legal documents to indicate that each condition should be applied to its corresponding element.

• In a contract, applicando singula singulis would mean that each clause should be applied to its corresponding party. For example, if the contract states that party A will provide a service and party B will pay for it, applicando singula singulis would mean that party A is only obligated to provide the service if party B pays for it.
• In a lease agreement, applicando singula singulis would mean that each term should be applied to its corresponding obligation. For example, if the lease states that the tenant is responsible for paying rent and maintaining the property, applicando singula singulis would mean that the landlord cannot hold the tenant responsible for property maintenance if the tenant is not in arrears on rent payments.

These examples illustrate how applicando singula singulis was used to ensure that each element of a legal document was applied to its corresponding obligation or condition.