It’s pretty clear:” believing the good news that Christ died for his or her sins…”
If they wish to amend it to “* plus these other items...” they should.
I suspect that it’s more in line with the Easy Believerism of the sinner’s prayer theology.
It says it right in the preface.
The mission statement of Insight for Living, the Bible-teaching ministry of Chuck Swindoll, states that we are committed to excellence in communicating the truths of Scripture and the person of Jesus Christ. And while a grace-based ministry such as ours allows for freedom of interpretation and expression in many areas of Christian practice, we believe that the following essential beliefs are absolute and non-negotiable.