THE authors of the religious instruction program suspended in a Queensland school have obtained legal advice showing they were following the law.

Youthworks writes the Connect program, under review by the State Government because of concerns raised at Windsor State School, it was "proselytising" children.

Principal Matthew Keong wrote to parents advising the Connect syllabus was not approved as it taught material like "every single person has sinned and rejected God and deserves to be punished".

Youthworks Minister Support Director Jon Thorpe stood by the material and also had legal advice Mr Keong was in the wrong suspending the program.

Youthworks obtained legal advice from Brisbane barrister Stewart Webster which confirmed it was operating within the law.

Mr Webster advised his understanding of the Education Act by Education Queensland had "no prohibition on proselytising".

Proselytising is defined as the attempt to convert someone from one religion, belief, or opinion to another.

Mr Webster said the prohibition appeared in Education Queensland policy in the context of "cooperative arrangements" and it referred to attempting to persuade people to change religions denomination only - such as switching from Baptist to Presbyterian.

"It is plain from the context the prohibition is to the effect a person delivering religious instruction may not attempt to persuade a student to change from one denomination or society to another," he wrote.

"In the context of the Policy, the prohibition has nothing to do with informing students about what it means to be a Christian and does not prevent a person delivering religious instruction from inviting students to consider for themselves the central teachings of Christianity."

In Mr Webster's view, the Connect program which Mr Keong objected to "do not in fact contravene the prohibition on proseltysing in the Policy".

"The extracts from the Connect program to which Mr Keong has taken objection largely reflect the central tenants of the Christian faith, something expressly permitted by the Act, the Regulation and the Policy," he said.

"Mr Keong has misunderstood the meaning of proselytising in the Policy and may not understand the statutory and regulatory regime governing the delivery of religious instruction.

"The decision to prevent the further use of the Connect program at Windsor State School is not justified on the grounds set out in the letter and Mr Keong's approach is not consistent with the policy.

"Further, the decision recorded in the letter in substances operates as a suspension on religious instruction at the school. Because that suspension is unjustified, it appears to be in contravention of s76 pf te Act/.

"Mr Keong has also acted outside the Act if he has not given an option to parents of children who are not members of the denominations represented in the cooperative agreement to consent to their children attending religious instruction.

"Mr Keong's approach is directly inconsistent with s29 of the Regulation."

It is understood Youthworks has submitted the legal advice to Education Minister Kate Jones for consideration.