It is taking place every first Sunday of the month.
The new Guard Of Honour (GOH), SAF Band and Precision Gun Drill Squad (MP) will match from Heeren to Istana and meet outside and do a Change Of Guard (COG) parade.
No problem of taking photos of the GOH at Istana outside as long as you do not cause any obstruction or spying with your camera. Reason for CISCO guards checking on you is to ensure that you do not carry weapons or any related items that can jeopardise the situation. Security safety first. Lots of people also taking photos including tourists. Remember not to stand to near to the GOH as they need to perform the change of guard duty and show.