As a part of moving Istio under the CNCF, we will be updating the CLA requirements for contributing Istio to use the CNCF CLA. This will be a multi-stage process, which will start today. If you have not already signed the CNCF CLA, you may find instructions to do so here. We expect to remove the requirement for signing the Google CLA in the upcoming weeks. Thank you for your patience, and please respond here if you run into difficulty with the new CLA process.