I don't know does that mean I will need to replace my motor? I certainly hope not, because quite frankly I can't afford a new motor. I beleive this creates a disparity amongst the competitors. Are the "fixed" motors deemed to be legal? This should not tolerable, and I beleive disparity was an issue in the past.
As I have openly stated before rules should be written with safety, durability, and performance in that order.  
I don't recall anything about repairing the engines being brought up at the "rules meeting", a new timing chain is not going to give me a performance edge, and I don't think anybody else who has replaced their chains if done so correctly has an edge
I still think the rules should have been looked at by a rules committee comprised of teams and officials to come up with a revamped package that fulfills the needs of both sides with a stable platform on which the division can function on.

This is where the fun begins and you CAN blame the crate cheaters in racing for your circumstance, regardless if your "certified" crate engine sealer, repair facility, etc, is doing the job or not. Sealed Crate motors at most tracks are allowed to be repaired or have very specific parts replaced for durability concerns. Not all tracks - just some.

The two primary areas both break seals. One is the timing chain and the other is the oil pan. The timing chain issue is often looked at as the weak link inside the Mexican manufactured GM SBC's. The fix is a double roller chain style replacement part. Where people raise their eyebrows is that this allows verifying the camshaft degree in that specific engine and based on its "current" condition. The technician can change it, adding anywhere from 10 to 20 HP and 5 to 10 lbs of torque. It may not sound like much...

Oil Pans allow access to the bottom end and a full blue print of the rotating assembly.

In either case, once the engine is resealed, most track tech officials will not tear it down - IMO. And as has been pointed out - some tracks in the U.S. do NOT allow repair of a crate motor and reuse in its racing series, thus the only option is to literately go buy a new one. The crate debate some argue have created such anxiety for both race tracks and competitors, they are now treated no different than built motors.

GM would solve a lot of problems if they built the engines properly with a stronger timing chain and improved oil pan like the way Ford builds (sub-contracts) it's sealed crate engines. GM has resisted because of cost.

As I understand it for most tracks here in Ontario, Crate engines are not allowed to be raced as unsealed "built" motors, because the cylinder heads are illegal (Vortec) in the built rules section, but don't quote me on that.

I don't feel I'm jumping to conclusions at all. "If you open the motor it is no longer legal" I'm paraphrasing here but that was the gist of the reply. Um that's pretty much a statement.
The bottom line is rules should not be like windshield wipers swinging back and forth. As for not fixing a motor that is really dependent on what's broken and as long as it doesn't involve modification or deviation from the 88958668 - GMPP CIRCLE TRACK CRATE ENGINE TECHNICAL MANUAL FOR 88958602, 88958603, 88958604. It should be allowable.
As for changing timing in the motor I'm unaware how it can be done using the OEM parts outlined in the previously mentioned book, while being witnessed by a track official.
I do not think rebuilding should be allowed as you're not likely to get it done with a big advantage over the cost of a new motor if any at all. I might further the discussion by stating the whole concept of the crate program was to ensure a cost reduction in the racing program to maintain viability. From the inception of the program cost control was the bottom line. Replacing an engine with a failing timing chain is not in my mind good for cost control.
I believe the problem was resultant of allowing the engines to exceed the recommended RPM limit recommended. Most tracks allowed this to happen to keep the crates competitive with "builts" when they ruled the track. Flamboro has had a broken chain take out a newer crate, Lawrence had problems with his as well. Not looking to turn the world upside down here just looking to ensure my program is as reliable as everybody else's.

Follow up : Received a call from From Mr. Sheridan and replacing the worn timing chain for a new one will be allowed. I'm sure that is a relief to many as it is to me.

Follow up : Received a call from From Mr. Sheridan and replacing the worn timing chain for a new one will be allowed. I'm sure that is a relief to many as it is to me.

Sounds to me he wanted the opportunity to check with his tech guys. Hmmmmmm, novel approach 😉

Yeah we just got the word at the shop here too, valve springs and timing chains may be "upgraded" but only by us.  Carquest has had the track record--we never, ever do cheater stuff for the crate motors.  Not worth the possible damage to our reputation.  If we refresh the motor (gaskets/rings/bearings) then it's no longer a crate motor.  But the timing chain and valve springs are a-ok.