What does 'ad needed' mean in English?

'ad needed' (as needed) in English sentences indicates that a specific thing or action will only happen if required. For example:

• I will provide additional support, 'ad needed'. (If necessary, I will provide additional support.)
• The project will be extended, 'ad needed'. (If required, the project will be extended.)
• We will hire more staff, 'ad needed'. (If needed, we will hire more staff.)