You wouldn't send a business rule from a web page, you'd put it in the domain model on the server.
The web page has a UI model, not a domain model.
The web page has a UI model, not a domain model.
¹ Note that reconstitution does not do away with anemic objects - reconstitution does not implement logic in a purely object-oriented way, i.e. the logic does not travel, but the data does.