A more thorough explanation:

Definition: Onerando pro rata portion is a legal term that means "of charging according to a ratable proportion." It refers to a writ for a joint tenant or cotenant who is distrained for more rent than is proportionately required.

Example: If two people own a property together and one of them is responsible for paying 60% of the rent, but they are both being charged the same amount, the joint tenant who is paying more than their fair share can use the onerando pro rata portione writ to challenge the excessive rent.

This legal term is used to ensure that each tenant pays their fair share of rent or other expenses related to a property. It is important for joint tenants or cotenants to understand their rights and responsibilities when it comes to sharing the costs of a property.