I have read some horror stories on CANLII about parents behaving badly and this mostly has to do with access; that is what makes it to trial.
When access is 50/50 what is needed to change decision making authority.
Is showing the other parent is incompetent, acting unilaterally sometimes and does not participating enough? Married couple have these problems so it is normal I guess.
When access is 100% with one parent I read a CANLII saying it was unnatural for that parent not to have the decision making rights for them.
Anyone have links?
Is 80/20 enough?
You basically need to prove the other parent is:
1. Non responsive; or
2. Incompetent in making or contributing to the decision; or
3. Just disagreeing to create conflict and preventing a decision being made for the child(ren) that will impact their health and/or well being.
You basically have to prove the other parent is impacting the children's best interests.
Also, you have to have a REASON to go to court. 99% of children are healthy, enrolled in school and often the need to wield the "Sword of Sole Custody". Now, if you have a child with special needs (education or medical or both) this is where things get complex.
But, if you are going to court for "power" with no "objective"... Say like to get your child vaccinated by COVID-19 and the other parent has objected to the child being vaccinated then you have a REASON to go to court to get a decision made.
But, often, the court will not remove joint-custody... They will just order that the responsible parent is now responsible for vaccinations and narrow the issue. They don't just throw "sole custody" around these days.
Go to court with no reason other than panic about the "future" and nothing that needs to be determined (like vaccination, surgery or a school change) then, get ready to get burned hard by a judge.
You need a lawyer... They can guide you on things like this. They will ask you these questions and explain in detail why you need to have a REASON to go to court.
Courts deal with decisions that need to be determined NOW... Not hypothetical anxious fears that in the future something may happen. They will order costs against you and say... come back when you have a real dispute that needs resolution.
Get a good lawyer.