Error for District Court to simultaneously bar challenges raised before the magistrate and hold all challenges not raised before the magistrate to be waived.
Employer had a duty to list the firing exception in the summary of plan benefits; this exclusion justifies reformation of the plan, which should be considered by the court sitting in equity as being similar to the fraud element of equitable estoppel.
As Plan provisions enabled the individual to accurately calculate benefits, standalone claim of equitable estoppel is not available.
http://www.opn.ca6.uscourts.gov/opinions.pdf/18a0114p-06.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.