Jockeys are to be banned from betting on New Zealand races on the days they are riding.

The change, which comes into effect on Thursday, will put an end to the current practice of jockeys being allowed to bet on the horse they are riding and on any race in which they are not competing.

New Zealand Thoroughbred Racing says the changes were initiated in 2013 and have been approved by all stakeholders, including the New Zealand Jockeys' Association.

"The appearance, as well as the practice of integrity, is critical against a backdrop of rapidly evolving gambling options which are creating issues for many sports," NZTR chairman Matthew Goodson said.

"The strengthening of this racing rule will provide greater protection for punters, which is critical for our industry, and support our integrity services."

The issue of riders betting on races has been in the spotlight after jockey David Walker was charged with two counts of betting on another horse in a race he was riding in.

The charges relate to meetings at Waverley on July 31 and Awapuni on August 16, and a hearing is scheduled for September 18 at Trentham.