Leave During Notice Period - Can't be Denied by the Employer

One of my friend is working on notice period, he gave me call and ask very interesting query, which i thought to present for all. 

Query - Can Employer Denied Leave application of an employee on the ground of - that employee is serving notice period? 

Answer -  No. (I immediately reverted him) 

An employer can't denied the employee's request for availing leave during the notice period. 

Though I reverted this to my friend but his anxiety didn't came down, he added 

Do you have any supporting for this ?

I reverted - No, currently I'm expressing this on the basses of my understand and experiences in this industry. 

On my trust he accepted this fact, but somewhere this was hammering me in deep, as I present all my statement with required supporting. Thus decided to do some research on this. 

Finally I got it !!!

Here, my statement is supported by the virtue of the Hon'ble High Court of Delhi in the case of Ghanshyam Vs. Delhi Metro Rail Corporation 2007.