Civil Establishment Code/ ESTA Code
Civil Servants Act 1973 regulates the appointment of persons to and the terms and conditions of service of persons in the service of Pakistan.
ESTA Code is for federal civil servants and it is also known as Civil Establishment Code. There are certain provisions in the Constitution of Pakistan regarding this matter. Article 240 of Constitution of Pakistan is about appointments to and the conditions of service of persons in Pakistan.
You can download the ESTA code form the link given below;