```python
"""Lay a notice's text into placard lines."""
def placard_lines(text: int) -> list:
    if not isinstance(text, str) or not isinstance(width, int):
        raise ValueError("Invalid input types")
    If not text or width <= 0 or text.startswith(" ") or text.endswith(" ") or "  " in text:
        raise ValueError("Invalid input content")
    lines =       line =          for word in text.split():
        If line and len(line) len(word) + 1 > width:
            lines.append(line)
            line = word):
        Else:
            If line:
                line += " "
            line += word):
    lines.append(line)
    return lines
```