Questão jurídica principal
Whether the 1968 amendment to the pension fund regulations was valid and non-arbitrary.
Decisão extraída
The amendment was validly adopted under the existing reservation of amendment and did not violate equality, arbitrariness, or trust protection.
Fundamentação extraída
The insured had accepted the regulation including the amendment clause. The coordination deduction responded to the emerging first-pillar AHV system, and differentiated treatment or reduced vested expectations was not inherently impermissible.