Q: updating validations

For a contact component that contains multiple sub components (email, phone, etc) I create a single changeset with validations based on the added sub components. Data for each sub component is stored in a dictionary so the changeset responds to updates to individual sub component fields.

Sub components can be added and removed.

However when I add or remove a sub component I would need to update the validation map. However that can only be when instantiating the Changeset.

Is the a way to update an existing changeset with a new validation map?