The CTW/ATC summer program in Paris is open to anyone who is interested and has the requisite background, including advanced undergraduates, graduate students, postdocs, faculty, autodidacts, artists, writers and independent researchers. The Rencontres, or Encounters with Contemporary Thinkers, are open to the general public (space permitting).
There is a rolling admissions and acceptance policy, and early applications are welcome. The final deadline for the Paris program is March 15 for the upcoming summer. Applicants will be informed of the status of their applications within a few weeks. For the 2019 summer online course with the University of the Commons, there is a rolling admissions policy until June 30 (but early applications are welcome). The short application form can be found here.
The application is available here in two formats: pdf and word. If possible, electronic copies of the application and supporting materials should be e-mailed directly to <firstname.lastname@example.org>.