Installation of KDYMM Sultan Johor

The news was out early! As of yesterday, the announcement on stamps of 3 denominations (60 sen, 80 sen and RM 1.00) and gold medallion (by Bank Negara Malaysia) will be issued in conjunction with the installation.

With 23 March 2015 (Monday) already announced as being a holiday for Johor, I wonder how will the stamp sales be arranged?

Here is one of the sources: