It´s great to see you wanting to join the IFATC Team! To answer your questions:
There is no time limit to when you can control. Open at any time of the day for a minimum of 1 hour at an airport highlighted in the Weekly IFATC Schedules such as this one:
You can contact a Recruiter through the application form linked in our IFATC Recruitment Post wich can be found here:
Thank you for your interrest and I hope to see you in the Recruitment Process soon, should you have any further questions you can always shoot me or any other Recruiter a PM here on the Forum.
Edit: By posting and contributing to this Forum for a few hours your Trust Level will increase which will allow you to send Personal Messages.