Cash is the driving force behind auxiliary operations. Departments that are able to grow their revenue streams beyond estimated figures in the beginning of the fiscal year are entitled to request additional budget authority if they wish to spend the funds. Since auxiliaries are self supporting departments, it is considered prudent financial stewardship to build a cash cushion or emergency fund to offset financial difficulties due to market condition changes. As noted in the Budget Authority explanation, cash and budget authority work together, but cash is the critical factor. An auxiliary operation with $1,000 in budget authority but only $500 in cash will be limited to $500 in spending. Therefore, more cash equates to more options for an operation and any auxiliary operation that generates more cash than estimated can request additional budget authority from the University Business Office if needed.