This confuses me a bit, because I think we've got two contradictory messages here unless I'm reading it wrong.
"O5-x: Overseer-level clearance is given only to the directors of the SCP Project. The x indicates their number, ranging from 1 to 12 (e.g. O5-7). O5 personnel are permitted to access any and all data related to the SCP objects. However, due to the sensitive nature of their position, O5 personnel are not permitted to have any direct contact with a SCP object, nor may they enter any site housing a SCP object under any circumstances." is the description of O5 personnel given in the Security Clearance Levels section, and this SCP clearly states in the beginning in gigantic letters, "Under direct orders of the founder, access is limited to those with Overseer clearance." If access is taken to mean 'knowledge of what this thing actually is', and not 'utilization of the stream's properties', then the bit with the researcher requesting a comparison between it and SCP-500 needs to be stricken, as there's no reason for anyone to be running any tests on it at all. It's a bit nitpicky, but I didn't want to change anything since I don't know which meaning was originally intended. For all I know, it could be the sole exception to 'no 05s touching SCPs'.