Changes to the Municipal Securities Rulemaking Board’s (MSRB) information facilities to better align the language of the information facilities to the MSRB’s administration of these systems are operative today (see MSRB Notice 2015-11). Among other things, these changes include adding references to the MSRB core operational hours of 7:00 a.m. to 7:00 p.m. Eastern Time on business days. All manuals and specifications for the MSRB’s systems have been updated to clarify the availability of MSRB Support during core operational hours.