Harry
From what looks to be the source you used (Wikipedia article, which is very informative) I note the following:
(1) In early 2005, rehabilitation of the Tapline at an estimated cost of US$100 to US$300 million was one of the strategic options being considered by the Jordanian government to meet oil needs. {Possible problem being the increase in diameter needed to be viable?}
(2) The pipeline was built and operated by the Trans-Arabian Pipeline Company.--snip--The company continued operating with no oil being transported until the end of 2002, when Aramco fully closed the Tapline subsidiary.
With things getting squirrely again, does it argue for or against opening that transfer mode again? Granted, at the moment Syria is intensely unstable, but that route seems to run less in the ISIS sorts of areas and more in the "controllable" areas. (All labels conditional, at best).