Hi Dimitri,
Please view the following link:
http://help.sap.com/saphelp_erp60_sp/helpdata/en/4f/993851446d11d189700000e8322d00/content.htm
It summarizes all the authorization objects available for archive link objects.
If they are not sufficient for you business needs, you may consider add an implicit enhancement.
Regards,
Liran