The section that you should be looking at is:
What the documents must show
If you are applying from within the United Kingdom, the balance must show that you have had at least £800 in your account at all times over the three-month period.
If you are applying from outside the United Kingdom, the balance must show that you have had at least £2,800 in your account at all times over the three-month period.
And also see
this:
Can my dependants join me in the UK?
Your husband, wife, civil partner or eligible partner and children under 18 can join you as your dependants in the UK if:
they have a visa for this purpose and
you can support them without any help from public funds. You need £1,600 for each dependant joining you within 12 months of your arrival in the UK and £533 thereafter.
Dont make the mistake of NOT disclosing your dependent's details. In the additional information you need to say that your dependents are not applying for a Tier-1 Dependent Status simultaneously but would join you at a later date once you have made adequate arrangements for your stay and livelihood in UK and are in a position to support them. Their travel plan/date is not available yet.
The way that the PBS 9 and its Appendix-1 have been drafted seem to give an impression that even if your dependents are not applying with you but plan to travel in next 2 months you need to show adequate maintenance fund availability for them too when you make an application solely for the main applicant. This I feel is not indicated in the PBS guidance.