on the monthly basis vs on the monthly based

Some examples from the web:

• Compiled data are supplied to the Commission on a monthly basis.
• The Eurosystem shall publish on a monthly basis the weighted average residual maturity by issuer residence, separating international organisations and multilateral development banks from other issuers, of its PSPP holdings.
• Minimum data to be provided by the reporting agents to the NCBs on a monthly basis.
• The paying agency shall inspect the integrity of the seals on a monthly basis to ensure that they remain intact.
• Member States shall notify the Commission on a monthly basis of the effective presence of their vessels in the SPFO area in 2009.
• The banking pool refinanced the portfolio on a monthly basis. Therefore Euribor one month is applied.
• The intervention agency shall inspect the integrity of the seals on a monthly basis to ensure that they remain intact. These inspections should be detailed in a report.
• Financial derivatives Minimum data to be provided by the reporting agents to the NCBs on a monthly basis
• This informal body, which was established through a Resolution of the Luxembourg European Council in December 1997, brings together on a monthly basis the finance ministers of the euro area.
• The Regulation will be reviewed monthly on the basis of the analytical results obtained.
• One of the changes introduced by Regulation ECB/2001/13 concerns the reporting on a monthly basis of some BSI series that were previously reported on a quarterly basis according to Regulation ECB/1998/16.
• The reference date of these reports shall be the most recent coupon payment date except for ABSs paying the coupon on a monthly basis, in which case the surveillance report shall be published at least quarterly.
• 3. Member States shall communicate to the Commission on a monthly basis following the expiry of validity of export licences the quantity of unused export licences.
• 3. Member States shall communicate to the Commission on a monthly basis following the expiry of validity of export licences the quantity of unused export licences.
• 3. Member States shall communicate to the Commission on a monthly basis following the expiry of the validity of the export licences the unused quantity of export licences.
• 3. Member States shall communicate to the Commission on a monthly basis following the expiry of the validity of the export licences the unused quantity of export licences.
• The data supplied to the industry on a monthly basis by the FEGA (the ministerial body responsible for quota management in Spain) did not reflect overruns in actual deliveries as compared to the cumulative theoretical quota for the corresponding month.
• the confirmed presence of any TSEs other than BSE shall be notified to the Commission on a monthly basis.
• Member States shall communicate to the Commission on a monthly basis following the expiry of validity of export licences the quantity of unused export licences.
• Member States shall notify the Commission on a monthly basis of the names and characteristics, including GT, of their vessels engaged in the fishery in the SPFO area.

Some examples from the web:

• In order to take into account different national practices, Member States should be allowed to set rules requiring that monthly paper-based statements of payment accounts are always to be given free of charge.
• Bringing forward of monthly twelfths based on specific needs of EAGF and the Community's cash position
• Woman's Day magazine wants to do a monthly column based on my book, 200 things every woman should do before she dies.
• The profit and loss accounts are translated monthly into Euro based on the exchange rates prevailing at the end of each month.
• Summer view seems like a really efficient place... winner of several awards, commendations, and monthly bonuses... all based on occupancy.
• 1. The Member States shall, as soon as the data referred to in Article 9 is received and analyzed, communicate to the Commission a monthly summary based on the data for the previous month.
• The ECB has also compiled and released, on an experimental basis, monthly HICP-based estimates of administered prices in the euro area, using information on HICP sub-indices published by Eurostat and definitions agreed within the ESCB.
• Monthly import statistics based on actual data that is provided by customs authorities in Member States under Article 14(6) of the basic Regulation on products subject to anti-dumping measures.
• In order to eliminate the effect of the sharp drop in prices during the IP, the calculation was based on the monthly average Hynix prices to independent customers by product type.
• But I do have an address on the monthly payment.
• You spend on the monthly installment, rent and the kid.
• Before the beginning of each financial year, the Commission shall determine for that purpose monthly expenditure profiles based, if necessary, on average monthly expenditure during the previous three years.
• What a nonsense that we are spending EUR 200 million a year of taxpayers' money on the monthly jaunt to Strasbourg.
• In addition, adjustments may be needed for the quarterly tables even if no adjustment is reported on the monthly Table 1.
• The Member States shall, as soon as the data referred to in paragraphs 1 and 2 is received and analysed, communicate to the Commission a monthly summary based on the data for the previous month.
• The aim here is not to call into question the validity of the HICP, which is based on monthly observation and recording by the national statistical offices of over 700 representative goods and services, equivalent to nearly 1.7 million observations in 180000 sales points a month.
• On the other hand, in the chapter on buildings, this House neglects to take a clear stance on the monthly travelling circus to Strasbourg that costs approximately EUR 200 million per year.
• To that end, at the beginning of each financial year, the Commission shall determine monthly expenditure profiles based, where appropriate, on average monthly expenditure during the previous three years.
• (monthly average values based on the average of the 24-hour representative composite samples taken over a month)
• Perhaps we could close the gap between differing remuneration of MEPs by basing it on the monthly salaries of senior State offices in that particular country; but, for us, the principle of the single across-the-board salary is an irrevocable one.