Fair and equitable treatment/Minimum standard of treatment, including denial of justice claims
Umbrella clause
National treatment
Most-favoured nation treatment
Arbitrary, unreasonable and/or discriminatory measures
http://globalarbitrationreview.com/news/article/15038/noble-ecuador-settle-port-dispute-looms/ (requires subscription)
https://books.google.ch/books?id=iVMyAQAAQBAJ&pg=PA264&lpg=PA264&dq=noble+energy+ecuador+icsid+settlement&source=bl&ots=7bibDDazug&sig=6Km2BsTbIbBPim3blHkDBua8zxA&hl=en&sa=X&ei=ONKzVL_fA8LN7Qbpk4CwCg&ved=0CCAQ6AEwAjgK#v=onepage&q=noble%20energy%20ecuador%20icsid%20settlement&f=false