I am an employee of a University which is funded by the Central Government. At the same time I am a writer and write novels/shor-stories. I have been approached by a film production house. They want to make a film on my recently published novel and also want me to write more stuff for them professionally. Early to this, I never got any royaltee from any of my published books but now I want to take writing as side profession. Can I sign a contract with this production house or can sale my previously written novel for a film ataptation ? If I write for them on weekends, will it against service rules ?