Below is the only known reference to the Law of Solar Unity in the writings of Alice A. Bailey (AAB) and Djwhal Khul (DK). Links on these pages of the Laws of Alice A. Bailey are to the online books at the Lucis Trust website.
For a discussion of what AAB means by a “law” please see Alice A. Bailey – What is a Law?
I. The Subsidiary laws. [ of the Law of Attraction ]
2. Law of Progress.
3. Law of Sex.
4. Law of Magnetism.
5. Law of Radiation.
6. Law of the Lotus.
7. Law of Colour.
10. Law of Solar Unity.
11. Law of the Schools.
You are welcome to post your comments and understanding of the Law of Separateness.