Oh my, my first visit to this thread and boy do you have some shockers! I'm in Australia and our system is considerably more regulated than yours (in fact I believe we are the most regulated cabling industry in the world). You have to be a "Registered cabler" (it used to be a license) to run any comms cabling here and DIY is totally illegal even in your own home although a lot of people take the risk. We have a certificate that a cabler has to issue on completion called a TCA1 to certify it meets standards and we also have one called a TCA2 (this is the fun one) which is used by a cabler to condem cabling that is not up to standard.
We also are not allowed to make leads (patch or fly) ourselves as they have to carry an approval tick which we can't issue for multiple reasons.
I however am often the one making things messy but only temporarily as I specialize in rapid cutovers of PABXs for places like hotels and minesites. Some years ago I did the Argyle diamond mine and had 15 mins to complete the cutover (I had a team working with me) and if I remember correctly the financial impacts of every minute over run was AU$1million. We did it in 10mins. Another was a hotel in Perth which we changed over in 4 mins (there was only two of us on this) and I have pictures from that one, I did the cutover and my partner in crime did the programming.
First getting started, I had taken the old Krone blocks out and put the new in.....https://www.dropbox.com/s/6548oan9mjwvuqs/Just%20getting%20started.jpg?dl=0
Then it gets messy as I double jumper everything making sure I can strip the old connections later without interupting the new......https://www.dropbox.com/s/rs2zwk0l9uolyw6/Work%20in%20progress.jpg?dl=0
And finally it looks better after everything is cleaned up....https://www.dropbox.com/s/g7vdifj5zgda6ki/Job%20finished.jpg?dl=0
Not sure how long I can leave these on dropbox so if anyone can tell me how to put them here more permenantly, just let me know/