Complex sentence: Unified: (Pursuit style bike) was first recognized by UCI in 2014, but unofficially several performances below were on bikes that fully complied with the Pursuit style rules, hence they are listed as such, even before they were eligible for the Unified Hour record.
Split into simpler sentences: Unified: (Pursuit style bike) was first recognized by UCI in 2014, but unofficially several performances below were on bikes that fully complied with the Pursuit style rule. Hhence they are listed as such, even before they were eligible for the Unified Hour record.