Contract notice period vs longer notice to resign

[smithers]

Hi all,

Been a while since my last post, been keeping my head down trying to make SA life achievable.

My boss closed 1 business down and brought me across to a new venture he took on, i have been here just over a month.

I want to resign from the company, but as it is a new job, new business, i assume the notice period may be new?

Still pushing for the employment contract.

I want to give 6 weeks notice making my last day 31 Jan 2019, is it common to give more that the minimum notice period?

(edited)