Clause 19
...deals with the term, commencement and application of Concorde.
The current agreement runs from 1 January 1998 until 31 December 2007.
Clause 19.4
...enables the later adherence of constructors who apply for the purpose to FIA and if "FIA has confirmed its agreement
to them becoming a party (such agreement not to be unreasonably withheld) and provided that they do so within 30 days
of their entry to F1 being accepted".
[1, 15]