Hey, one of the .arc authors and maintainers here. Only one of each section is what we designed for though the validations for that might be broken (and if so

Hey, one of the .arc authors and maintainers here. Only one of each section is what we designed for though the validations for that might be broken (and if so we can fix right away). Nesting is limited to one level. No need for more that we've seen yet.