Member Federations have until 15th May 2020 to submit their applications. After this deadline the Evaluation Commission will be formed to analyse applications received, and prepare their recommendations to the Executive Committee. If it's deemed necessary, members of the Commission may visit venues proposed for hosting competitions in order to verify credibility of the information provided and to make sure everything complies with the pledged commitments.
The decision to award ISSF Competitions for 2021-2024 to Member Federations will be made at the Executive Committee meeting at the end of July 2020.
You can find out how to apply here