Whenever D-1543 is communicated it means something’s about to be publicly disclosed.
(which it just did - see my last Elon Musk dig)

D
Morning sun brings heat.
Full moon coming.
Undiscovered stars learned.
Missions forward.
Q

Translation: Sun = D-CLAS
Heat = Justice
Full Moon = Transparency
Undiscovered Stars = Facts Emerging
Missions Forward = Ability to move Ahead