Centre has sought a zero tolerance policy towards aviation safety as state governments agreed to implement all regulations in this regard within three months. Addressing the day-long session of State Aviation Secretaries in New Delhi on Wednesday, Civil Aviation Secretary Nasim Zaidi asked state governments to implement at the earliest the series of rules and regulations on safety, brought out by the Directorate General of Civil Aviation.Observing that there was an urgent need to harmonise the security procedures at all airports in the country, he asked the states to ensure that the local police personnel were well trained and proficient in their work as those belonging to the Central Industrial Security Force which guard all aviation installations.The meeting came after a series of accidents like the Mangalore and Faridabad air crashes and helicopter accidents, two of which claimed the lives of Andhra Pradesh and Arunachal Pradesh chief ministers Y S R Reddy and Dorjee Khandu.