The Alliance can allocate all the resources produced by a planet to the Battle Group. The Alliance Government will assist them in managing it, ensuring a higher output than they would achieve on their own. The planet must pay the Imperial Tax, but the Alliance can cover this tax.
Apart from the output of their home planet, the Alliance will also provide substantial resources based on the Battle Group's participation in Alliance battles and their contributions.
What the Battle Group wants, the Alliance has it all.
This can be called a [Battle Group Military and Economic Mutual Assistance Agreement].
Indeed, compared to the Furyflame and New Era Torch that are already completely controlled by the Alliance, their independence is relatively strong. Theoretically, they can refuse the Alliance's war summons, and even if they accept, they have the right to act independently according to their own ideas in battle.