What really matters is that you use the same category components throughout the cable channel, and the resulting installation passes the category test suite. You cannot mix and match different categories of components, or use unregistered components, e.g. your RJ-61, and claim a particular category. The standard you must meet is ANSI/TIA/EIA 568 Commercial Building Telecommunications Standard.
You also need to follow the ANSI/TIA/EIA Commercial Building Pathways and Spaces, along with the various laws, rules, and ordinances required by your AHJ. The least is usually the NFPA 70, the National Electric Code (NEC), but your AHJ may have more stringent requirements. Failing to do this can get you fined and have your building red-tagged for occupation until the problems are corrected. There is also the threat of criminal prosecution in the case of something like a fire where anyone is injured or killed.
Based on you comment, this is for voice (POTS) cabling. There is no distance limitation or test suite for POTS cabling, which is usually Category-3 cabling. Remember that the telco uses Category-3 copper cabling to get from the CO to your site, usually several miles away.
The current best practice is to install all UTP cabling in a data category. That way the cable plant can be used for both voice and data. Trying to install and maintain two separate cable plants is expensive and confusing.