POB Attacks - Adding Attackers

[Inferno]

Alright, so this has crossed my mind a bit, and the recent update of an attack declaration pushed the ball down the hill.

Is it legitimate to add more attacking factions after the attack declaration has already been initiation?

For example, the attack in question (it should be obvious which one I am talking about because it fits this subject), it was first Outcasts, Rogues, and Generic Pirates. However, there were threads asking for help from other factions (i.e. the Lane Hackers who weren't included in the original attack declaration) and replies to those threads regarding assistance (i.e. Huggie talking about speaking with the K'Hara.) Would it be considered fine if the attackers added more factions to the attacker's side, even if the additional factions are -.9 to the poster? On top of that, would it need/be a whole new declaration?

If I don't make sense, a badly formed example:

LibNavy decide to attack a Wild base. The Navy calls for the Junkers to help (because they know the area better.)
The LNavy declares the attack thread and the required time of 24 hours passes. After the attacks can start, the Junkers want to call for an ally yo assist them in the attack. The Navy, not knowing who these assistants are, agree because why not. The Junkers summon, however, Auxesia (for those who don't know somehow, very wanted in Liberty and -.9)

Does the LNavy require another attack, or can they not use Auxesia's assistance as they are two hostile factions?

This should be obvious but I want community feedback.

tl;dr Is it allowed to add factions (even hostile to your ID) after the attack begins and it will count as the same attack?