Hiscox's definition of a Christian church

from Edward T. Hiscox's Principles and Practices for Baptist Churches (Judson Press, 1984; repr., Grand Rapids: Kregel, 1980), 20.

"A Christian Church is a company of regenerate persons, baptized on a profession of faith in Christ; united in covenant for worship, instruction, the observance of Christian ordinances, and fo such service as the gospel requires; recognizing and accepting Christ as their supreme Lord and Lawgiver, and taking His Word as their only and sufficient rule of faith and practice in all matters of conscience and religion."

Is this definition accurate? Is his definition too narrow?

Hiscox's definition of a Christian church

from Edward T. Hiscox's Principles and Practices for Baptist Churches (Judson Press, 1984; repr., Grand Rapids: Kregel, 1980), 20.

"A Christian Church is a company of regenerate persons, baptized on a profession of faith in Christ; united in covenant for worship, instruction, the observance of Christian ordinances, and fo such service as the gospel requires; recognizing and accepting Christ as their supreme Lord and Lawgiver, and taking His Word as their only and sufficient rule of faith and practice in all matters of conscience and religion."

Is this definition accurate? Is his definition too narrow?