As the statute requiring indictment within 30 days is followed by a provision mandating a speedy trial, and the latter clause establishes that the right in "this section" is waived if not asserted, that qualification can be imputed to the first clause.
An untimely indictment is therefore not a jurisdictional flaw, and a deft who waived all challenges to earlier proceedings is validly sentenced after receiving an indictment defective under the statute.
http://www.opn.ca6.uscourts.gov/opinions.pdf/18a0118p-06.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.