max-file-descriptor mystery configuration?

On the current server Solaris 10 there is following configuration for user:

ulimit -Sn

64000

ulimit -Hn

260000

prctl -n process.max-file-descriptor $$

NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT

process.max-file-descriptor

        basic           64.0K       -   deny                               638

        privileged       260K       -   deny                                 -

        system          2.15G     max   deny

id -p

uid=2709(run) gid=2709(run) projid=0(system)

When I run projects -l I get following

system

        projid : 0

        comment: ""

        users  : (none)

        groups : (none)

        attribs:

I have checked there is no /etc/system file

The part I am confused where file descriptor is configured on this server?

It looks like project is empty no attribs and there is no /etc/system.

Could you please advise what else I should be checking to find out  where max-file-descriptor for user run are configured?