Difference between Contingent Immunization and Hedging and Return seeking (2 portfolio approach)

Does anyone know what the difference is?

Where do you see the hedging and return-seeking that you mention?

In Asset Allocation

Contingent immunization is seeking excess return until your assets hit a certain knockout scenario, at which point you fully immunize your assets to grow and completely pay off a liability when it comes due.

Hedging return seeking is a 2 portfolio approach, in which one portfolio contains a hedging asset and it can either partially or fully hedge the liability, and the excess is put in a return seeking portfolio.

Been a while though so if my lingo’s off I am sure S2 will correct me.