Repostion to project basepoint vs internal origin

[kevin_peter]

If i accidently moved the linked model, which options do i have to use?

Repostion to project basepoint or internal origin

[barthbradley]

Is the Linked using Shared Coordinates?  If so, it's not relative to the PBP or Project Base Point Startup Location (Internal Origin). It's relative to the Survey Point.  

...not Shared? Just Repositioning? Depends. May not even matter if your PBP is still at its Startup Location. Is it? 

 https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2016/EN...

[kevin_peter]

Internal base point will not change ever.

So if acciedently MEP model has been moved,u can recorrect it using internal base point.

Correct?