签证费用问题 who will pay 2nd instalment?

The 1st instalment of the Visa Application Charge must be paid at the time of application.
The 2nd instalment of the Visa Application Charge for dependents aged 18 years or over with less than functional English must be paid before the visa is granted.

Skilled - Independent (Migrant) visa (subclass 175)

Charge Type                  Charge Amount  
1st instalment                 $2525  
2nd instalment                  $3510  

who will pay 2nd instalment? 如何评价with less than functional English ？

副申请人雅思成绩没到4.5就需要付这第二笔费用。。

第二笔费用当然是你交啦
functional english应该是指雅思不够4，5吧？或者4分，反正很低啦

感谢两位支持！！！