The Let During A Service
Rule 22
22. THE LET DURING A SERVICE (OLD 14)
The service is a let if:
a. The ball served touches the net, strap or band, and is otherwise good; or, after touching the net, strap or band, touches the receiver or the receivers partner or anything they wear or carry before hitting the ground; or
b. The ball is served when the receiver is not ready.
In the case of a service let, that particular service shall not count, and the server shall serve again, but a service let does not cancel a previous fault.