Below is the only known reference to the Law of Adjustment or of Balance by Alice A. Bailey (AAB) in her voluminous writings and those given to her by 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?
This law is, as we know, the basic law of all manifestation, and the paramount law for this solar system. It might strictly be called the Law of Adjustment or of Balance, for it conditions that aspect of electrical phenomena which we call neutral. The Law of Economy is the basic law of one pole, that of the negative aspect; the Law of Synthesis is the basic law of the positive pole, but the Law of Attraction is the law for the fire which is produced  by the merging during evolution of the two poles. From the standpoint of the human being, it is that which brings about the realisation of self-consciousness; from the point of view of the subhuman beings it is that which draws all forms of life on to self-realisation; whilst in connection with the superhuman aspect it may be stated that this law of life expands into the processes conditioned by the higher law of Synthesis, of which the Law of Attraction is but a subsidiary branch.
You are welcome to post your comments and understanding of this law.