Sub Station leave

Station Leave is obvious for Govt. Employee-no doubt. But after office hours if someone leavers of station under compelling medical ground leaving intimation to his immediate officer through SMS and again on the next day communicated the same officer through SMS regarding doctor's advise for taking 3days rest followed by mail to the Head of the department (RC-I) narating the entire facts the reasons for leaving station and intimation to whom. Now my question whether this may be treated as unauthorized absence? Further it is not out of place to mention here that on joining office commuted leave has also been sanctioned. Again my query whether any post facto station leave is required?. As per DOPT Order when leave is sanctioned and address during leave period is mentioned, no separate station leave permission is required. Sir yours opinion.