The phrase "with observance of" is correct and usable in written English.
It can be used when referring to compliance or adherence to rules, regulations, or guidelines.
Example: "The project will proceed with observance of all safety protocols to ensure the well-being of the team."
Alternatives: "in accordance with" or "in compliance with".
If he advocated respect for French law along with observance of Islam, this was further evidence of his malign intentions.
64 of 144 (44.4%) patients complained of difficulties with observance of the drug regime.
The psychiatric care of the patients in these establishments demands specially organized constant and intensive supervision with observance of the raised security measures.
Universal PCR laboratory procedures were used, such as physical separation of the steps involved in PCR and unidirectional workflow; specimens were processed carefully with observance of universal PCR laboratory precautions.
This included establishing two Ma¯ori-only focus groups in regions with proportionally higher Ma¯ori populations and with observance of tikanga (Ma¯ori protocol) during the meetings in order to create a respectful research environment and to facilitate participant connection with the research process.
According to Conroy, with the observance of the Jewish holiday Yom Kippur and with Columbus Day closing down the U.S. bond market, today will be one of the quietest days of the year.
Lack of financial ambition goes along with the observance of unwritten sumptuary laws.
For a long time, problems with the observance of the rights of refugees have been noted in all border countries.
There were no Jewish leaders at his installation service, a diocese spokesman explained, because of conflicts with the observance of Passover.
It also posted it on the White House Web site, to coincide with Iranian observance of the ancient festival of Nowruz, which celebrates the arrival of spring.
This year, they are seeking to finish their work by March 21 in order to avoid conflicting with the observance of Passover and Easter.
