It is important to distinguish between core beliefs, denominational distinctives, personal beliefs, and personal preferences because if you don’t make these distinctions your might do some serious damage to someone’s personal relationship with Jesus. For example, to elevate a dress code to a first order or core belief in terms of what even makes one a Christian would distort the truth of the gospel to being something unrecognizable (e.g. belief in Jesus’ death and resurrection + the right clothing = salvation). Although an extreme example, when we elevate our preferences or beliefs and impose them on others as first order issues, we create division, water down the truths of the Bible, and create factions in the body. From what I have read of the ACOP statement of faith and Narrative Commentary is does a good job at being clear about these distinctions, but also allowing space for many to exist in the same camp while allowing the Holy Spirit to lead us all into all truth.