ASL 2.0 based software contribution to FreeBSD code base

[Saifi Khan]

Hi all:

Is Apache Software License (ASL) 2.0 based software contributions
accepted in FreeBSD code base ?

Specific case to consider would be:
 a. device driver code released under ASL 2.0

 b. code contributed to kernel (eg. scheduler implementation)
    under ASL 2.0

c. code contributed to userland (eg. new implementation of
   ctags) under ASL 2.0

Can some of the experienced members share how things work 
within the context of FreeBSD project ?


thanks
Saifi.