If it's regarding their rights to participate in the assets and income of the trust, as it appears from your post in the Other/General thread, it depends what the declaration of trust instrument says. If it is a discretionary trust, you have no 'right' to receive, but rather what is known as a 'mere expectancy'. You have the right to be considered for dividend, not an actual right to dividend.
You also have the right to due administration of the trust by the trustee.