As john_tullamarine indicates, jurisdictions vary, and obstacle databases vary. In Australia, for example, the obstacle analysis in the 'public domain' (RDS) does not extend beyond 15000 M (8.1 nm), after that, or after 30 nm if your obstacle database goes there (sounds like Jeppesen), you're on your own. Many, many 3rd segments go beyond 30 miles, and there you are, 2000 feet below MSA and past the arrow head at the end of your OEI procedure.
The only legimitate, safe, and moral OEI procedures are those providing lateral and vertical obstacle clearance all the way up to MSA, whereafter the operating pilot may then operate within the normal PANS-OPS (TERPS) obstacle clearance limits. It's entirely 100% achievable and possible, I do it every day.
Regards,
Old Smokey