English to Russian Law/Patents Law: Contract(s)

Upon IPO or upon the later of (i) a Sale and (ii) 5 (five) years after Completion, the Shares will be cancelled and the SB Member shall resign, provided however that upon IPO the Investor will procure the appointment of a suitable individual nominated by XXX as member of the Supervisory Board of the listed Company with effect from IPO for a customary term of at least 4 (four) years, all subject to best practice corporate governance principles prevailing at the time of the IPO.

с соблюдением принципов корпоративного управления (как сюда привязать best practice )?