Contractor Question

I have contracted several times throughout my career in IT. I was presented with another contractor opportunity and there are some terms of agreement that I have not encountered before and was wondering if this is something new or if its isolated to more or less this contracting company.

The condition applies to the accrued benefits during employment. Such as paid holidays and vacation time. The question is this, is it common or becoming common for the employee to pay into the accrual of paid holidays and vacation?

I have an option tree to choose from that varies from 5 days vacation to 15 days vacation plus 6 paid holidays. In this scenario, if I do not wish to accrue paid holidays or paid vacation my salary will be X amount. If, I choose to select one of the options my salary will decrease accordingly.

The contract is for a state government position. As we all know, government has many holidays and days off throughout the year. If I were to not choose any options, those state holidays would end up being no-pay days for me.

As I stated, I am accustomed to contract work. I have done W-2 and 1099 scenarios several times over the years. Under 1099 conditions, I am aware those conditions typically do not provide any benefits and I am responsible for them. But under W-2 conditions I am used to receiving most of the typical benefits that a normal employee would receive.