An amil should have knowledge about this classification of the zodiac constellations. Firstly, it should be decided if the amal has to be done during the day it at night. If the amil decides to do the amal during daytime then he should do it in Burj Roze and if he decides to do the amal at night then he should stick to the Burj Laily. The Moon should also be active in the selected burj. If the amal is done at night but in a Burj Roze then the amal will get nullified. Conversely, if the amal is done during daytime but in Burj Laily then also the amal will not be successful. If a wrong Burj is selected but the planetary aspects are positive then the amal can succeed to some extent. However, if a wrong Burj is chosen and the planetary aspects (nazar/drishti) turn out to be negative too then the amil can face serious troubles. This makes it clear that a careful consideration of this factor is essential.
Here is a complete list of the Burj Laily and Burj Roze amongst the 12 Zodiac constellations.