Just Curious ji

I do have to stand with Tejwant Singh ji in his response to you.

I have just explained to you that Sri Guru Granth Sahib serves as the divine light which clears away doubt and delusion. Light brings clarity, not confusion. Guru Granth is a teacher who empowers students. It is not like many other scriptures which contain rules for living from dawn to dusk. Guru Granth brings freedom not enslavement.

The Sikh Rehat Maryada was not formulated to compensate for any lack of clarity in Sri Guru Granth Sahib. It importance to Sikhs was historically political, and one can read it almost as a set of by-laws that govern the panth. By virtue of the Sikh Rehat Maryada, the panth was able to constitute itself as an organized entity with a discernible identity in the eyes of the law. The logic of Sri Guru Granth Sahib is the framework for the Sikh Rehat Maryada, and gives the SRM its internal logic and consistency.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/love-and-marriage/8803-is-sin-sikh-marry-non-sikh.html

So there is no way to argue that somehow the Sikh Rehat Maryada corrects for deficiencies in Sri Guru Granth Sahib. And I am actually stunned that you read or heard somewhere that it does so.

Please seek out threads here at SPN where the history of the SRM is discussed. I hope it is an eye-opener for you.